Dyfyniad APA

Williamson, R. (1981). Genetic engineeering. Academic press.

Dyfyniad Arddull Chicago

Williamson, Robert,ed. Genetic Engineeering. London: Academic press, 1981.

Dyfyniad MLA

Williamson, Robert,ed. Genetic Engineeering. Academic press, 1981.

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