Cita APA (7th ed.)
Stanley Gibbons Publications Ltd & Stanley Gibbons. Collect British Stamps: A Stanley Gibbons Checklist of the Stamps of Great Britain (Primera edición.).
Cita Chicago (17th ed.)
Stanley Gibbons Publications Ltd i Stanley Gibbons. Collect British Stamps: A Stanley Gibbons Checklist of the Stamps of Great Britain. Primera edición.
Cita MLA (9th ed.)
Stanley Gibbons Publications Ltd i Stanley Gibbons. Collect British Stamps: A Stanley Gibbons Checklist of the Stamps of Great Britain. Primera edición.
Atenció: Aquestes cites poden no estar 100% correctes.