APA-referens (7:e uppl.)
Unitrade Press, Chung, A., & Narbonne, R. F. The New Specialized Catalogue of Canada Post Official First Day Covers: 1997 Covering 25 years of Canada Post Official First Day Covers (Primera edición.).
Chicago-referens (17:e uppl.)
Unitrade Press, Andrew Chung, och R. F. Narbonne. The New Specialized Catalogue of Canada Post Official First Day Covers: 1997 Covering 25 Years of Canada Post Official First Day Covers. Primera edición.
MLA-referens (9:e uppl.)
Unitrade Press, et al. The New Specialized Catalogue of Canada Post Official First Day Covers: 1997 Covering 25 Years of Canada Post Official First Day Covers. Primera edición.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.