Citazione Stile APA (7a Edizione)

Ketelbey, D. M. (1948). A history of modern times: From 1789 to the present day (New ed., revised.). Harrap.

Citazione stile Chigago Style (17a edizione)

Ketelbey, D. M. A History of Modern Times: From 1789 to the Present Day. New ed., revised. London [u.a.]: Harrap, 1948.

Citatione MLA (9a ed.)

Ketelbey, D. M. A History of Modern Times: From 1789 to the Present Day. New ed., revised. Harrap, 1948.