Lua APA (7ú heag.)
Stanley Gibbons Publications, Ltd, Stanley Gibbons, & James, W. The Stanley Gibbons Book of Stamps and Stamp Collecting (Segunda edición.).
Lua i Stíl Chicago (17ú heag.)
Stanley Gibbons Publications, Ltd, Stanley Gibbons, agus Watson James. The Stanley Gibbons Book of Stamps and Stamp Collecting. Segunda edición.
Lua MLA (9ú heag.)
Stanley Gibbons Publications, Ltd, et al. The Stanley Gibbons Book of Stamps and Stamp Collecting. Segunda edición.
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