APA (7th ed.) Citation

(1976). Hummel: The complete collector's guide and illustrated reference. Portfolio Press.

Chicago Style (17th ed.) Citation

Hummel: The Complete Collector's Guide and Illustrated Reference. Huntington, NY: Portfolio Press, 1976.

MLA (9th ed.) Citation

Hummel: The Complete Collector's Guide and Illustrated Reference. Portfolio Press, 1976.

Warning: These citations may not always be 100% accurate.