APA-referens (7:e uppl.)

Thomas, M. (1992). How to increase your travel sales: A guide to effective customer relations & sales techniques. Hospitality Press.

Chicago-referens (17:e uppl.)

Thomas, Michael. How to Increase Your Travel Sales: A Guide to Effective Customer Relations & Sales Techniques. Melbourne: Hospitality Press, 1992.

MLA-referens (9:e uppl.)

Thomas, Michael. How to Increase Your Travel Sales: A Guide to Effective Customer Relations & Sales Techniques. Hospitality Press, 1992.