APA aipamena

RATAN, L. (1990). SOIL EROSION IN THE TROPICS: PRINCIPLES AND MANAGEMENT. MCGRAW HILL BOOK CO.

Chicago Style aipamena

RATAN, LAL. SOIL EROSION IN THE TROPICS: PRINCIPLES AND MANAGEMENT. NEW-YORK: MCGRAW HILL BOOK CO, 1990.

MLA aipamena

RATAN, LAL. SOIL EROSION IN THE TROPICS: PRINCIPLES AND MANAGEMENT. MCGRAW HILL BOOK CO, 1990.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.