APA-referens (7:e uppl.)

Sethi, P. (2002). Millennium trends in travel tourism. Rajat.

Chicago-referens (17:e uppl.)

Sethi, Praveen. Millennium Trends in Travel Tourism. New delhi: Rajat, 2002.

MLA-referens (9:e uppl.)

Sethi, Praveen. Millennium Trends in Travel Tourism. Rajat, 2002.