Penson, J. B., Capps, O., Rosson, C. P., & Woodward, R. T. (2015). Introduction to agricultural economics (Sixth edition, Global edition.). Pearson Education.
Chicago Style aipamenaPenson, John B., Oral Capps, C. Parr Rosson, and Richard T. Woodward. Introduction to Agricultural Economics. Sixth edition, Global edition. Harlow, Essex, England: Pearson Education, 2015.
MLA aipamenaPenson, John B., et al. Introduction to Agricultural Economics. Sixth edition, Global edition. Pearson Education, 2015.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.