Cita APA (7a 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 Style (17a ed.)
Crescent Books, Richard West, y Robin Ellis. The Whole World Stamp Catalog: Current Stamps and Postal Items from over 200 Countries and Where to Buy Them.
Cita MLA (9a ed.)
Crescent Books, et al. The Whole World Stamp Catalog: Current Stamps and Postal Items from over 200 Countries and Where to Buy Them.
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