APA-referens (7:e uppl.)

Harrel, W. (1993). Learn Ventura 4.0 in a day. BOB.

Chicago-referens (17:e uppl.)

Harrel, William. Learn Ventura 4.0 in a Day. New Delhi: BOB, 1993.

MLA-referens (9:e uppl.)

Harrel, William. Learn Ventura 4.0 in a Day. BOB, 1993.