Dube, D. R. (1987). Agricultural geography: Issues and applications. Gain.
Chicago Style (17th ed.) ZitazioaDube, Dr. R.S. Agricultural Geography: Issues and Applications. Delhi: Gain, 1987.
MLA (9th ed.) ZitazioaDube, Dr. R.S. Agricultural Geography: Issues and Applications. Gain, 1987.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.