APA-referens (7:e uppl.)

Van Tol, A. (2010). Orca echoes resource guide. Orca Book Publishers.

Chicago-referens (17:e uppl.)

Van Tol, Alex. Orca Echoes Resource Guide. [Victoria, British Columbia]: Orca Book Publishers, 2010.

MLA-referens (9:e uppl.)

Van Tol, Alex. Orca Echoes Resource Guide. Orca Book Publishers, 2010.