Παραπομπή APA

Gray, P. (1967). dictionary of the biological sciences. Van Nostrand Reinhold Company.

Παραπομπή Chicago Style

Gray, Peter. Dictionary of the Biological Sciences. New York: Van Nostrand Reinhold Company, 1967.

Παραπομπή MLA

Gray, Peter. Dictionary of the Biological Sciences. Van Nostrand Reinhold Company, 1967.