Dyfyniad APA

Simpson, G. G., & Beck, W. S. (1965). Life: An introduction to biology (2nd ed.). National Book Store.

Dyfyniad Arddull Chicago

Simpson, George Gaylord, and William S. Beck. Life: An Introduction to Biology. 2nd ed. [Manila]: National Book Store, 1965.

Dyfyniad MLA

Simpson, George Gaylord, and William S. Beck. Life: An Introduction to Biology. 2nd ed. National Book Store, 1965.

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