APA-viite

U.S Gupta. (1982). Physiological aspects of dryland farming (5th.). Oxford & IBH Oub. Co.

Chicago-tyylinen lähdeviittaus

U.S Gupta. Physiological Aspects of Dryland Farming. 5th. N. delhi: Oxford & IBH Oub. Co, 1982.

MLA-viite

U.S Gupta. Physiological Aspects of Dryland Farming. 5th. Oxford & IBH Oub. Co, 1982.