APA (7th ed.) Citation

Brown, R. W. (1973). A first language: The early stages. Harvard University Press.

Chicago Style (17th ed.) Citation

Brown, Roger William. A First Language: The Early Stages. Cambridge, Mass: Harvard University Press, 1973.

MLA (9th ed.) Citation

Brown, Roger William. A First Language: The Early Stages. Harvard University Press, 1973.