APA цитиране

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

Чикагска система за цитиране

Purcell, Dennis., и Jock R. Anderson. Agricultural Extension and Research: Achievements and Problems in National Systems. Washington DC: World Bank, 1997.

MLA формат за цитиране

Purcell, Dennis., и Jock R. Anderson. Agricultural Extension and Research: Achievements and Problems in National Systems. Washington DC: World Bank, 1997.

Внимание: Тези цитати може да не са 100% точни.