Παραπομπή APA

Ketelbey, C. (1973). History of modern times: From 1789 (5th ed.). OUP.

Παραπομπή Chicago Style

Ketelbey, C.D.M. History of Modern Times: From 1789. 5th ed. Delhi: OUP, 1973.

Παραπομπή MLA

Ketelbey, C.D.M. History of Modern Times: From 1789. 5th ed. OUP, 1973.