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.
ציטוט MLAKolby, Jeff & others. GMAT: DATA Sufficiency Prep Course. Prakash Pub, 2015.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.