APA-referens (7:e uppl.)

Day, W. H. (1966). Petroleum marketing practices and problems. Commercial Pub.

Chicago-referens (17:e uppl.)

Day, William Henry. Petroleum Marketing Practices and Problems. Tulsa, Okla: Commercial Pub, 1966.

MLA-referens (9:e uppl.)

Day, William Henry. Petroleum Marketing Practices and Problems. Commercial Pub, 1966.