Dyfyniad APA

Curtis, F. D., Caldwell, O. W., & Sherman, N. H. (1940). Everyday biology. Ginn and Company.

Dyfyniad Arddull Chicago

Curtis, Francis Day, Otis William Caldwell, and Nina Henry Sherman. Everyday Biology. Boston: Ginn and Company, 1940.

Dyfyniad MLA

Curtis, Francis Day, et al. Everyday Biology. Ginn and Company, 1940.

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