APA-viite

Gupta, O. P. (1985). Aquatic weeds: :their menace and control. Today printers.

Chicago-tyylinen lähdeviittaus

Gupta, O P. Aquatic Weeds: :their Menace and Control. New delhi: Today printers, 1985.

MLA-viite

Gupta, O P. Aquatic Weeds: :their Menace and Control. Today printers, 1985.