(1972). A Survey of Research in geography. Popular Prakashan.
Chicago Style (17th ed.) ZitazioaA Survey of Research in Geography. New Delhi: Popular Prakashan, 1972.
MLA (9th ed.) ZitazioaA Survey of Research in Geography. Popular Prakashan, 1972.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.