APA aipamena

Sykes, P. (1950). History of exploration: From the earliest times to the present day (3rd ed.).

Chicago Style aipamena

Sykes, Percy. History of Exploration: From the Earliest Times to the Present Day. 3rd ed. 1950.

MLA aipamena

Sykes, Percy. History of Exploration: From the Earliest Times to the Present Day. 3rd ed. 1950.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.