APA (7th ed.) Zitazioa
American Philatelic Society. Fifty-second American Philatelic Congress: October 24-26, 1986 : Ambassador Hotel. Los Angeles, California.
Chicago Style (17th ed.) Zitazioa
American Philatelic Society. Fifty-second American Philatelic Congress: October 24-26, 1986 : Ambassador Hotel. Los Angeles, California.
MLA (9th ed.) Zitazioa
American Philatelic Society. Fifty-second American Philatelic Congress: October 24-26, 1986 : Ambassador Hotel. Los Angeles, California.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.