APA (7th ed.) Zitazioa
Clark, R. B., & Bowman, I. (1934). Geography in the schools of Europe.
Chicago Style (17th ed.) Zitazioa
Clark, Rose B., eta Isaiah Bowman. Geography in the Schools of Europe. 1934.
MLA (9th ed.) Zitazioa
Clark, Rose B., eta Isaiah Bowman. Geography in the Schools of Europe. 1934.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.