OBRIEN MARK. (1984). MBA ANSWER BOOK: A CARRER GUIDE FOR PERSON WHO MEAN BUSINESS. PRENTICE -HALL INTERNATIONAL, INC.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रOBRIEN MARK. MBA ANSWER BOOK: A CARRER GUIDE FOR PERSON WHO MEAN BUSINESS. NEW JERSE: PRENTICE -HALL INTERNATIONAL, INC, 1984.
एमएलए (9वां संस्करण) प्रशस्ति पत्रOBRIEN MARK. MBA ANSWER BOOK: A CARRER GUIDE FOR PERSON WHO MEAN BUSINESS. PRENTICE -HALL INTERNATIONAL, INC, 1984.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.