Cita APA

Gunawardana, A. M. T., Wickramasinghe, M. L., & Abeyratne, S. (1980). Farmers' knowledge and perception of improved technology: A study of five farming systems. Agrarian Research and Training Institute.

Chicago Style (17th ed.) Citation

Gunawardana, A. M. T., M. L. Wickramasinghe, i S. Abeyratne. Farmers' Knowledge and Perception of Improved Technology: A Study of Five Farming Systems. Colombo: Agrarian Research and Training Institute, 1980.

Cita MLA

Gunawardana, A. M. T., et al. Farmers' Knowledge and Perception of Improved Technology: A Study of Five Farming Systems. Agrarian Research and Training Institute, 1980.