Cita APA (7th ed.)
Federación Internacional de Filatelia & Singapore Post. World Stamp Championship 2004: Palmares Catalogue. 28 August to 1 September.
Cita Chicago (17th ed.)
Federación Internacional de Filatelia i Singapore Post. World Stamp Championship 2004: Palmares Catalogue. 28 August to 1 September.
Cita MLA (9th ed.)
Federación Internacional de Filatelia i Singapore Post. World Stamp Championship 2004: Palmares Catalogue. 28 August to 1 September.
Atenció: Aquestes cites poden no estar 100% correctes.