Laine, D. (2012). Frommer's national parks of the american west (8.).
Chicago Style (17th ed.) CitationLaine, Don. Frommer's National Parks of the American West. 8. 2012.
MLA引文Laine, Don. Frommer's National Parks of the American West. 8. 2012.
警告:這些引文格式不一定是100%准確.