APA-referens (7:e uppl.)

GUPTA S C. (1990). BUSINESS STATISTICS. HIMALAYA PUBLISHING HOUSE.

Chicago-referens (17:e uppl.)

GUPTA S C. BUSINESS STATISTICS. NEW DELHI: HIMALAYA PUBLISHING HOUSE, 1990.

MLA-referens (9:e uppl.)

GUPTA S C. BUSINESS STATISTICS. HIMALAYA PUBLISHING HOUSE, 1990.