Benedict, H. 1979. Early Lexical Development: Comprehension and Production. Journal of Child Language 6 (2), 183-200.
Farkas, Goerge and Beron Kurt. 2004. The Detailed Age Trajectory of Oral Vocabulary Knowledge: Differences by Class and Race. Social Science Research 33 (3), 464-497.
Gilliam, Walter S. and Paul B. de Mesquita. 2000. The Relationship Between Language and Cognitive Development
and Emotional-Behavioral Problems in Financially-Disadvantaged Preschoolers: A Longitudinal Investigation.Early Child Development and Care 162 (1), 9-24.
Hall, William S., William E. Nagy, and Linn R. L. 1984. Spoken Words, Effects of Situation and Social Group on Oral Word Usage and Frequency. Hillsdale: Lawrence Erlbaum.
Hao, Meiling, Shu Hua, Xing Ailing, and Li Ping. 2008. Early Vocabulary Inventory for Mandarin Chinese. Behavior Research Methods 40 (3), 728-733.
Hart, Betty and Todd R. Risley. 1995. Meaningful Differencesin the Everyday Experience of Young American Children.Baltimore: Paul H. Brookes Publishing.
Haycraft (ed.). 1978. Second Language Reading and Vocabulary Learning. Norwood: Ablex.
Laufer, Batia. 1998. The Development of Passive and Active Vocabulary in a Second Language: Same or Different?.Applied Linguistics 19 (2), 255-271.
NICHD Early Child Care Research Network. 2005. Pathways to Reading: The Role of Oral Language in the Transition to Reading. Developmental Psychology 41 (2), 428-442.
Nation I. S. P. 1990. Teaching and Learning Vocabulary. New York: Newburry House Publishers.
Qi, Cathy Huaqing, Ann P. Kaiser, Stephanie E. Milan, and Terry B. Hancock. 2006. Language Performance of Low-Income African American and European American Preschool Children on the PPVT-III. Language, Speech, and Hearing Services in Schools 37 (1), 5-16.
Restrepo, María Adelaida, Schwanenflugel Paula J., Jamilia Blake, Stacey Neuharth-Pritchett, Stephen E. Cramer, and Hilary P. Ruston. 2006. Performance on the PPVT-III and the EVT: Applicability of the Measures with African American and European American Preschool Children. Language,Speech, and Hearing Services in Schools 37 (1), 17-27.
Washington, Julie A. and Holly K. Craig. 1999. Performances of At-Risk, African American Preschoolers on the Peabody Picture Vocabulary. Language, Speech, and Hearing Services in Schools 30 (1), 75-82.
Wells, G. 1986. The Meaning Makers: Children Learning Language and Using Language to Learn. Portsmouth: Heinemann Educational Books Inc.