Style de citation APA

Purcell, D. L., & Anderson, J. R. 1. V. (1997). Agricultural extension and research: Achievements and problems in national systems. World Bank.

Style de citation Chicago

Purcell, Dennis L., et Jock R. 1941- Verfasser Anderson. Agricultural Extension and Research: Achievements and Problems in National Systems. Washington, D.C: World Bank, 1997.

Style de citation MLA

Purcell, Dennis L., et Jock R. 1941- Verfasser Anderson. Agricultural Extension and Research: Achievements and Problems in National Systems. World Bank, 1997.