Citazione Stile APA (7a Edizione)

Van Zyl, J. (1995). The relationship between farm size and efficiency in South Africa agriculture. World Bank, Agriculture and Natural Resources Dept., Office of the Director.

Citazione stile Chigago Style (17a edizione)

Van Zyl, Johan. The Relationship Between Farm Size and Efficiency in South Africa Agriculture. Washington, D.C: World Bank, Agriculture and Natural Resources Dept., Office of the Director, 1995.

Citatione MLA (9a ed.)

Van Zyl, Johan. The Relationship Between Farm Size and Efficiency in South Africa Agriculture. World Bank, Agriculture and Natural Resources Dept., Office of the Director, 1995.