APA (7th ed.) Citation

Cartwright, A. (1976). How many children? Routledge & K. Paul.

Chicago Style (17th ed.) Citation

Cartwright, Ann. How Many Children? London ; Boston: Routledge & K. Paul, 1976.

MLA (9th ed.) Citation

Cartwright, Ann. How Many Children? Routledge & K. Paul, 1976.