APA (7th ed.) Citation

Hart, N. W. M., Walker, R. F., & Gray, B. (1977). The language of children: A key to literacy. Addison-Wesley Pub. Co..

Chicago Style (17th ed.) Citation

Hart, N. W. M., R. F. Walker, and B. Gray. The Language of Children: A Key to Literacy. Reading, Mass.: Addison-Wesley Pub. Co., 1977.

MLA (8th ed.) Citation

Hart, N. W. M., et al. The Language of Children: A Key to Literacy. Addison-Wesley Pub. Co., 1977.