APA استشهاد

Butler, R. W. (2010). Aspects of tourism: The tourism area life cycle. Viva books.

استشهاد بنمط شيكاغو

Butler, Richard W. Aspects of Tourism: The Tourism Area Life Cycle. New Delhi: Viva books, 2010.

MLA استشهاد

Butler, Richard W. Aspects of Tourism: The Tourism Area Life Cycle. Viva books, 2010.