APA引文

Paap, P. (1993). Farmers or foresters: The use of tree in the sylvopastoral systems of the Atlantic Zone of Costa Rica.

Citación estilo Chicago

Paap, P.F. Farmers or Foresters: The Use of Tree in the Sylvopastoral Systems of the Atlantic Zone of Costa Rica. 1993.

MLA引文

Paap, P.F. Farmers or Foresters: The Use of Tree in the Sylvopastoral Systems of the Atlantic Zone of Costa Rica. 1993.

警告：这些引文格式不一定是100％准确.