Dyfyniad APA

Bullough, W. S. (1967). Evolution of differentiation. Academic Press.

Dyfyniad Arddull Chicago

Bullough, William S. Evolution of Differentiation. New York: Academic Press, 1967.

Dyfyniad MLA

Bullough, William S. Evolution of Differentiation. Academic Press, 1967.

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