John R.Hale. (1966). Age of exploration. Time Life International.
Chicago Style aipamenaJohn R.Hale. Age of Exploration. [S.l.]: Time Life International, 1966.
MLA aipamenaJohn R.Hale. Age of Exploration. Time Life International, 1966.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.