Snodgrass, M. . M., & Wallace, L. T. (1977). Agriculture , economics and resources management. Prentice hall.
Chicago Style aipamenaSnodgrass, Milton M., and L. T. Wallace. Agriculture , Economics and Resources Management. New Delhi: Prentice hall, 1977.
MLA aipamenaSnodgrass, Milton M., and L. T. Wallace. Agriculture , Economics and Resources Management. Prentice hall, 1977.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.