APA citiranje

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, and S. Abeyratne. Farmers' Knowledge and Perception of Improved Technology: A Study of Five Farming Systems. Colombo: Agrarian Research and Training Institute, 1980.

MLA citiranje

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.