Citazione Stile APA (7a Edizione)

Viveen, W. J. A. R. (1980). Practical manual for the culture of the african catfish Clarias Gariepinus. Directorate General International Cooperation of the Foreign Affairs.

Citazione stile Chigago Style (17a edizione)

Viveen, W. J. A. R. Practical Manual for the Culture of the African Catfish Clarias Gariepinus. La Haya: Directorate General International Cooperation of the Foreign Affairs, 1980.

Citatione MLA (9a ed.)

Viveen, W. J. A. R. Practical Manual for the Culture of the African Catfish Clarias Gariepinus. Directorate General International Cooperation of the Foreign Affairs, 1980.