United States Postal Service. (1998). 1998 [i.e. one thousand, nine hundred and ninety eight] stamp yearbook. U.S. Postal Service.
Chicago Style (17th ed.) CitationUnited States Postal Service. 1998 [i.e. One Thousand, Nine Hundred and Ninety Eight] Stamp Yearbook. España: U.S. Postal Service, 1998.
ציטוט MLAUnited States Postal Service. 1998 [i.e. One Thousand, Nine Hundred and Ninety Eight] Stamp Yearbook. U.S. Postal Service, 1998.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.