Shaner, W. W., Philipp, P. F., & Schmehl, W. R. (1982). Farming systems research and development: Guidelines for developing countries. Westview Press.
Citação do estilo Chicago (17ª ed.)Shaner, W. W., P. F. Philipp, e W. R. Schmehl. Farming Systems Research and Development: Guidelines for Developing Countries. Boulder, Colo: Westview Press, 1982.
Citação MLA (9ª ed.)Shaner, W. W., et al. Farming Systems Research and Development: Guidelines for Developing Countries. Westview Press, 1982.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.