APA (7th ed.) Citation

Williams, D. B. (1968). Agricultural extension: Farm extension services in Australia, Britain and the United States of America. Melbourne University Press; Cambridge University Press.

Chicago Style (17th ed.) Citation

Williams, D. B. Agricultural Extension: Farm Extension Services in Australia, Britain and the United States of America. [Carlton, Vic.] London, New York: Melbourne University Press; Cambridge University Press, 1968.

MLA (8th ed.) Citation

Williams, D. B. Agricultural Extension: Farm Extension Services in Australia, Britain and the United States of America. Melbourne University Press; Cambridge University Press, 1968.