Dyfyniad APA

Romer, A. (1971). Vertibrate paleontology (3rd ed.). University of Chicago Press.

Dyfyniad Arddull Chicago

Romer, Alfred. Vertibrate Paleontology. 3rd ed. Chicogo: University of Chicago Press, 1971.

Dyfyniad MLA

Romer, Alfred. Vertibrate Paleontology. 3rd ed. University of Chicago Press, 1971.

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