APA引文

Gewwald, N. J. (1980). The importance of fuelwood in Central America: An appraisal and a plan for action.

Citación estilo Chicago

Gewwald, N J. The Importance of Fuelwood in Central America: An Appraisal and a Plan for Action. 1980.

MLA引文

Gewwald, N J. The Importance of Fuelwood in Central America: An Appraisal and a Plan for Action. 1980.

警告：這些引文格式不一定是100％准確.