Peterson's Guides, I. (1988). Peterson's guide to graduate programs in the biological and agricultural sciences. Princeton, N.J.: Peterson's Guides.
Chicago Style aipamenaPeterson's Guides, Inc. Peterson's Guide to Graduate Programs in the Biological and Agricultural Sciences. Princeton, N.J.: Peterson's Guides, 1988.
MLA aipamenaPeterson's Guides, Inc. Peterson's Guide to Graduate Programs in the Biological and Agricultural Sciences. Princeton, N.J.: Peterson's Guides, 1988.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.