APA Edition Citation

Kolby, J. (2013). GMAT data sufficiency prep course. Prakash Books.

Chicago Edition Citation

Kolby, Jeffetc. GMAT Data Sufficiency Prep Course. New Delhi: Prakash Books, 2013.

MLA Edition Citation

Kolby, Jeffetc. GMAT Data Sufficiency Prep Course. Prakash Books, 2013.

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