Vatican Philatelic Society, Ufficio Philatelico e Numismatico, & Etchingham, J. Vatican stamp collection.
Chicago Style (17th ed.) CitationVatican Philatelic Society, Ufficio Philatelico e Numismatico, and John Etchingham. Vatican Stamp Collection.
MLA (8th ed.) CitationVatican Philatelic Society, et al. Vatican Stamp Collection.
Warning: These citations may not always be 100% accurate.