Cita APA (7th ed.)

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.

Cita Chicago (17th ed.)

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.

Cita MLA (9th 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.