Dyfyniad APA

Stanley, W. M., & Valens, E. G. (1961). Viruses and the nature of life. Dutton.

Dyfyniad Arddull Chicago

Stanley, Wendell M., and Evans G. Valens. Viruses and the Nature of Life. New York: Dutton, 1961.

Dyfyniad MLA

Stanley, Wendell M., and Evans G. Valens. Viruses and the Nature of Life. Dutton, 1961.

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