Dyfyniad APA

Harmer, S., & Shipley, A. (1968). Cambridge natural history: Birds. Today And Tommorow.

Dyfyniad Arddull Chicago

Harmer, S.F, and A.E Shipley. Cambridge Natural History: Birds. New Delhi: Today And Tommorow, 1968.

Dyfyniad MLA

Harmer, S.F, and A.E Shipley. Cambridge Natural History: Birds. Today And Tommorow, 1968.

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