APA (7th ed.) Citation

O'leary. (2004). The essential guide to doing research. SAGE.

Chicago Style (17th ed.) Citation

O'leary. The Essential Guide to Doing Research. London: SAGE, 2004.

MLA (8th ed.) Citation

O'leary. The Essential Guide to Doing Research. SAGE, 2004.

Warning: These citations may not always be 100% accurate.