APA (7. basım) Alıntı
United States Postal Service & United States Postal Service. International Postal Rates and Fees.
Chicago Style (17. basım) Atıf
United States Postal Service ve United States Postal Service. International Postal Rates and Fees.
MLA (9th ed.) Atıf
United States Postal Service ve United States Postal Service. International Postal Rates and Fees.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..