APA način citiranja (7. izdanje)
U.S. Postal Service & U.S. Postal Service. Wildlife America: A collection of U.S. Commemorative Stamps.
Čikaški stil citiranja (17. izdanje)
U.S. Postal Service i U.S. Postal Service. Wildlife America: A Collection of U.S. Commemorative Stamps.
MLA način citiranja (9. izdanje)
U.S. Postal Service i U.S. Postal Service. Wildlife America: A Collection of U.S. Commemorative Stamps.
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