APA

Humphreys R., . (1999). London : the mini rough guide. New York: Rough Guides on the Internet.

Chicago

Humphreys Rob, . 1999. London : the mini rough guide. New York: Rough Guides on the Internet.

Harvard

Humphreys R., . (1999). London : the mini rough guide. New York: Rough Guides on the Internet.

MLA

Humphreys Rob, . London : the mini rough guide. New York: Rough Guides on the Internet. 1999.