APA-čujuhus (7. p.)
Stanley Gibbons Publications Ltd & Allen, E. Collect British Stamps: A Stanley Gibbons Checklist of the Stamps of Great Britain (Vigésima edición.).
Chicago-čujuhus (17. p.)
Stanley Gibbons Publications Ltd juo Eric Allen. Collect British Stamps: A Stanley Gibbons Checklist of the Stamps of Great Britain. Vigésima edición.
MLA-čujuhus (9. p.)
Stanley Gibbons Publications Ltd juo Eric Allen. Collect British Stamps: A Stanley Gibbons Checklist of the Stamps of Great Britain. Vigésima edición.
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