Bull, W.A. "The Use of Vernacular Languages in Fundamental Education," International Journal of American Linguistics, 1955 , 21, 288-294.
2.
Cazden, C.B. "Some Views on Subcultural Differences in Child Language," unpublished manuscript prepared for U.S. Office of Education, Grant No. OE-5-10-239, Cambridge, Massachusetts: 1964.
3.
Fries, C.C.American English Grammar. New York: Appleton-Century, Croft, 1940.
4.
Loban, W.D.The Language of Elementary School Children, Champaign, Illinois: National Council of Teachers of English, 1963.
5.
Thomas, S., Schutz, S., & Keislar, E. "The Effect of Different Verbal Directions Upon the Interpretation of Conceptual Rules by Middle-and Lower-class Kindergarten Children," Paper presented at the annual meeting of the American Educational Research Association, Chicago, February 1968.
6.
Strickland, R.G. "The Language of Elementary School Children: Its Relationship to the Language of Reading Textbooks and the Quality of Reading of Selected Children ." Bulletin of School of Education, Indiana University, 1962, 38, Whole No. 4.
