Dyfyniad APA

Zentall, T. R., & Hogan, D. E. (1975). Key pecking in pigeons produced by pairing keylight with inaccessible grain.

Dyfyniad Arddull Chicago

Zentall, Thomas R., and David E. Hogan. Key Pecking in Pigeons Produced By Pairing Keylight With Inaccessible Grain. 1975.

Dyfyniad MLA

Zentall, Thomas R., and David E. Hogan. Key Pecking in Pigeons Produced By Pairing Keylight With Inaccessible Grain. 1975.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.