Strahler, A. N. (1969). Physical geography (3rd. ed.). Wiley Eastern.
Chicago Style aipamenaStrahler, Arthur N. Physical Geography. 3rd. ed. New Delhi: Wiley Eastern, 1969.
MLA aipamenaStrahler, Arthur N. Physical Geography. 3rd. ed. Wiley Eastern, 1969.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.