Dyfyniad APA

Johnson, G. B. (2000). The living world (2nd ed.). McGraw-Hill.

Dyfyniad Arddull Chicago

Johnson, George B. The Living World. 2nd ed. Boston: McGraw-Hill, 2000.

Dyfyniad MLA

Johnson, George B. The Living World. 2nd ed. McGraw-Hill, 2000.

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