APA Edition Citation

Kolby, J. (2011). GMAT: Data sufficiency prep course. Prakash Books.

Chicago Edition Citation

Kolby, Jeff. GMAT: Data Sufficiency Prep Course. New Delhi: Prakash Books, 2011.

MLA Edition Citation

Kolby, Jeff. GMAT: Data Sufficiency Prep Course. Prakash Books, 2011.

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