APA (7. basım) Alıntı
U.S. Postal Service & U.S. Postal Service. Wildlife America: A collection of U.S. Commemorative Stamps.
Chicago Style (17. basım) Atıf
U.S. Postal Service ve U.S. Postal Service. Wildlife America: A Collection of U.S. Commemorative Stamps.
MLA (9th ed.) Atıf
U.S. Postal Service ve U.S. Postal Service. Wildlife America: A Collection of U.S. Commemorative Stamps.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..