APA-viite (7. p.)
Helgren, J. A. (2013). Barron's encyclopedia of cat breeds: A complete guide to the domestic cats of North America. Barron's Educational Series, Inc..
Chicago-viite (17. p.)
Helgren, J. Anne. Barron's Encyclopedia of Cat Breeds: A Complete Guide to the Domestic Cats of North America. Hauppauge, New York: Barron's Educational Series, Inc., 2013.
MLA-viite (9. p.)
Helgren, J. Anne. Barron's Encyclopedia of Cat Breeds: A Complete Guide to the Domestic Cats of North America. Barron's Educational Series, Inc., 2013.
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