APA-čujuhus (7. p.)
Stanley Gibbons Publications Ltd, Bennett, R., & Watson, J. Philatelic Terms Illustrated.
Chicago-čujuhus (17. p.)
Stanley Gibbons Publications Ltd, Russell Bennett, juo James Watson. Philatelic Terms Illustrated.
MLA-čujuhus (9. p.)
Stanley Gibbons Publications Ltd, et al. Philatelic Terms Illustrated.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.