Abeyratne, F., Gunasena, H. P. M., & Tennakoon, D. (1986). Shifting farming: Towards stability : a study of four rainfed farming systems in Sri Lanka. Agrarian Research and Training Institute.
Citação do estilo Chicago (17ª ed.)Abeyratne, Fredrick, H. P. M. Gunasena, e D. Tennakoon. Shifting Farming: Towards Stability : A Study of Four Rainfed Farming Systems in Sri Lanka. Colombo: Agrarian Research and Training Institute, 1986.
Citação MLA (8ª ed.)Abeyratne, Fredrick, et al. Shifting Farming: Towards Stability : A Study of Four Rainfed Farming Systems in Sri Lanka. Agrarian Research and Training Institute, 1986.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.