Dyfyniad APA

Gray, P. (1970). encyclopaedia of the biological sciences. Van Nostrand Reinhold Company.

Dyfyniad Arddull Chicago

Gray, Peter. Encyclopaedia of the Biological Sciences. New York: Van Nostrand Reinhold Company, 1970.

Dyfyniad MLA

Gray, Peter. Encyclopaedia of the Biological Sciences. Van Nostrand Reinhold Company, 1970.

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