Cita APA

Shaner, W. W., Philipp, P. F., & Schmehl, W. R. (1982). Farming systems research and development: Guidelines for development countires. [S.l.]: Boulder, Col. : Westriew Press.

Citación estilo Chicago

Shaner, W. W., P. F. Philipp, y W. R. Schmehl. Farming Systems Research and Development: Guidelines for Development Countires. [S.l.]: Boulder, Col. : Westriew Press, 1982.

Cita MLA

Shaner, W. W., P. F. Philipp, y W. R. Schmehl. Farming Systems Research and Development: Guidelines for Development Countires. [S.l.]: Boulder, Col. : Westriew Press, 1982.