APA (7th ed.) Citation

Sykes, P. (1950). A history of exploration from the earliest times to the present day (3rd ed.). Routledge.

Chicago Style (17th ed.) Citation

Sykes, Percy. A History of Exploration from the Earliest Times to the Present Day. 3rd ed. London: Routledge, 1950.

MLA (8th ed.) Citation

Sykes, Percy. A History of Exploration from the Earliest Times to the Present Day. 3rd ed. Routledge, 1950.