Wimpenny, J., Weir, A., & Kacelnik, A. (2011). New Caledonia crows use tools for non-foraging activities. Springer-Verlag.
Chicago-čujuhus (17. p.)Wimpenny, J., A. Weir, juo A. Kacelnik. New Caledonia Crows Use Tools for Non-foraging Activities. Springer-Verlag, 2011.
MLA-čujuhus (9. p.)Wimpenny, J., et al. New Caledonia Crows Use Tools for Non-foraging Activities. Springer-Verlag, 2011.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.