APA (7th ed.) Citation

Downs & Keller. (1975). How to do library research (2nd ed.). University of Illinois Press.

Chicago Style (17th ed.) Citation

Downs and Keller. How to Do Library Research. 2nd ed. Urbana: University of Illinois Press, 1975.

MLA (8th ed.) Citation

Downs and Keller. How to Do Library Research. 2nd ed. University of Illinois Press, 1975.