APA-referens (7:e uppl.)

Lewis, G. M. (1930). An analysis of shipments of Texas sheep and goats. University of Texas.

Chicago-referens (17:e uppl.)

Lewis, George McKoy. An Analysis of Shipments of Texas Sheep and Goats. Austin, Tex.: University of Texas, 1930.

MLA-referens (8:e uppl.)

Lewis, George McKoy. An Analysis of Shipments of Texas Sheep and Goats. University of Texas, 1930.