Zimmerman, K. The USA book: A journey through America.
Lua i Stíl Chicago (17ú heag.)Zimmerman, Karla. The USA Book: A Journey Through America. Footscray, Vic. ; Oakland, CA : Lonely Planet Publications, 2011.
Lua MLA (8ú heag.)Zimmerman, Karla. The USA Book: A Journey Through America.
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