Keegan, J. (1981). The Nature War. Holt, Rinehart and Winston.
Chicago Style (17th ed.) ZitazioaKeegan, John. The Nature War. New York: Holt, Rinehart and Winston, 1981.
MLA (9th ed.) ZitazioaKeegan, John. The Nature War. Holt, Rinehart and Winston, 1981.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.