APA-referens (7:e uppl.)

Não informado. Racing Pigeon Bulletin. International Federation of American Homing Pigeon Fanciers.

Chicago-referens (17:e uppl.)

Não informado. Racing Pigeon Bulletin. Centerville, Ohio: International Federation of American Homing Pigeon Fanciers.

MLA-referens (8:e uppl.)

Não informado. Racing Pigeon Bulletin. International Federation of American Homing Pigeon Fanciers.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.