APA (7th ed.) Citation

Cohen, L., Morrison, K., & Manion, L. (2008). Research methods in education (6th ed.). Routledge.

Chicago Style (17th ed.) Citation

Cohen, Louis, Keith Morrison, and Lawrence Manion. Research Methods in Education. 6th ed. London [etc.]: Routledge, 2008.

MLA (9th ed.) Citation

Cohen, Louis, et al. Research Methods in Education. 6th ed. Routledge, 2008.