APA-referens (7:e uppl.)

Kohls, R. (2002). Marketing of agricultura; products (9th.). Prentice Hall.

Chicago-referens (17:e uppl.)

Kohls, Rochard. Marketing of Agricultura; Products. 9th. New Delhi: Prentice Hall, 2002.

MLA-referens (9:e uppl.)

Kohls, Rochard. Marketing of Agricultura; Products. 9th. Prentice Hall, 2002.