Cita APA (7th ed.)
Crescent Books, West, R., & Ellis, R. The Whole World Stamp Catalog: Current stamps and postal items from over 200 countries and where to buy them.
Cita Chicago (17th ed.)
Crescent Books, Richard West, i Robin Ellis. The Whole World Stamp Catalog: Current Stamps and Postal Items from over 200 Countries and Where to Buy Them.
Cita MLA (9th ed.)
Crescent Books, et al. The Whole World Stamp Catalog: Current Stamps and Postal Items from over 200 Countries and Where to Buy Them.
Atenció: Aquestes cites poden no estar 100% correctes.