APA-referens

Holloway, J. C., & Humphreys, C. (2012). The business of tourism (9th ed.). Pearson.

Chicago-stil citat

Holloway, J. Christopher, och Claire Humphreys. The Business of Tourism. 9th ed. Harlow, England ; N.Y.: Pearson, 2012.

MLA-referens

Holloway, J. Christopher, och Claire Humphreys. The Business of Tourism. 9th ed. Pearson, 2012.