Dyfyniad APA

Purves, W. K. (1995). Life: The science of biology (4th ed.). Sinaver Associates Inc..

Dyfyniad Arddull Chicago

Purves, William K. Life: The Science of Biology. 4th ed. Sunderland: Sinaver Associates Inc., 1995.

Dyfyniad MLA

Purves, William K. Life: The Science of Biology. 4th ed. Sinaver Associates Inc., 1995.

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