APA引文

M J Kropff. (1990). Introduction to crop ecology. Wageningen: Department of Theoretical Production Ecology.

Trích dẫn kiểu Chicago

M J Kropff. Introduction to Crop Ecology. Wageningen: Department of Theoretical Production Ecology, 1990.

MLA引文

M J Kropff. Introduction to Crop Ecology. Wageningen: Department of Theoretical Production Ecology, 1990.

警告：這些引文格式不一定是100％准確.