Cita APA (7th ed.)
Windward & James, W. The Stanley Gibbons Book of Stamps and Stamp Collecting (Primera edición.).
Cita Chicago (17th ed.)
Windward i Watson James. The Stanley Gibbons Book of Stamps and Stamp Collecting. Primera edición.
Cita MLA (9th ed.)
Windward i Watson James. The Stanley Gibbons Book of Stamps and Stamp Collecting. Primera edición.
Atenció: Aquestes cites poden no estar 100% correctes.