APA-referens (7:e uppl.)

Wimpenny, J., Weir, A., & Kacelnik, A. (2011). New Caledonia crows use tools for non-foraging activities. Springer-Verlag.

Chicago-referens (17:e uppl.)

Wimpenny, J., A. Weir, och A. Kacelnik. New Caledonia Crows Use Tools for Non-foraging Activities. Springer-Verlag, 2011.

MLA-referens (9:e uppl.)

Wimpenny, J., et al. New Caledonia Crows Use Tools for Non-foraging Activities. Springer-Verlag, 2011.