Παραπομπή σε μορφή APA (7η εκδ.)
Villiard, P. Collecting Stamps: Everything you need to know to pursue the world's most popular hobby for fun, knowledge, and profit.
Παραπομπή σε μορφή Chicago (17η εκδ.)
Villiard, Paul. Collecting Stamps: Everything You Need to Know to Pursue the World's Most Popular Hobby for Fun, Knowledge, and Profit.
Παραπομπή σε μορφή MLA (9th εκδ.)
Villiard, Paul. Collecting Stamps: Everything You Need to Know to Pursue the World's Most Popular Hobby for Fun, Knowledge, and Profit.
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