APA-viite (7. p.)

Williams, D. B. (1968). Agricultural extension : farm extension: Services in Australia, Britain and the united states of America. Melbourne U.Pr.

Chicago-viite (17. p.)

Williams, Donald B. Agricultural Extension : Farm Extension: Services in Australia, Britain and the United States of America. Carlton, Vic: Melbourne U.Pr, 1968.

MLA-viite (9. p.)

Williams, Donald B. Agricultural Extension : Farm Extension: Services in Australia, Britain and the United States of America. Melbourne U.Pr, 1968.