APA način citiranja

(Firm), P. (1997). The Guide to graduate environmental programs. Washington, D.C.

Čikaški stil citiranja

(Firm), ProQuest. The Guide to Graduate Environmental Programs. Washington, D.C, 1997.

MLA način citiranja

(Firm), ProQuest. The Guide to Graduate Environmental Programs. Washington, D.C, 1997.

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