Dyfyniad APA

Hoyo, J. d., Elliott, A., & sargatal, j. (1992). Handbook of the birds of the world: Volume 1 Ostrich to Ducks. Lynx Edicions.

Dyfyniad Arddull Chicago

Hoyo, Josep del, Andrew Elliott, and jordi sargatal. Handbook of the Birds of the World: Volume 1 Ostrich to Ducks. Barcelona: Lynx Edicions, 1992.

Dyfyniad MLA

Hoyo, Josep del, et al. Handbook of the Birds of the World: Volume 1 Ostrich to Ducks. Lynx Edicions, 1992.

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