Dyfyniad APA
Gray, P. (1972). Student dictionary of biology. Van Nostrand Reinhold Company.
Dyfyniad Arddull Chicago
Gray, Peter. Student Dictionary of Biology. New York: Van Nostrand Reinhold Company, 1972.
Dyfyniad MLA
Gray, Peter. Student Dictionary of Biology. Van Nostrand Reinhold Company, 1972.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.