APA-referens (7:e uppl.)

Keay, J. (2000). History: From the earliest civilizations to the boom of the twenty-first century (NA.). Harper Press.

Chicago-referens (17:e uppl.)

Keay, John. History: From the Earliest Civilizations to the Boom of the Twenty-first Century. NA. London: Harper Press, 2000.

MLA-referens (9:e uppl.)

Keay, John. History: From the Earliest Civilizations to the Boom of the Twenty-first Century. NA. Harper Press, 2000.