Kolby, J. &. o. (2015). GMAT: DATA Sufficiency Prep Course. Prakash Pub.
Chicago Style (17th ed.) CitationKolby, Jeff & others. GMAT: DATA Sufficiency Prep Course. New Delhi: Prakash Pub, 2015.
MLA引文Kolby, Jeff & others. GMAT: DATA Sufficiency Prep Course. Prakash Pub, 2015.
警告:這些引文格式不一定是100%准確.