APA引文

Shultz, S., Faustino, J., & Melgar, D. (1997). Agroforestry and soil conservation: Adoption and profitability in El Salvador.

Citación estilo Chicago

Shultz, Steven, Jorge Faustino, y Douglas Melgar. Agroforestry and Soil Conservation: Adoption and Profitability in El Salvador. 1997.

MLA引文

Shultz, Steven, Jorge Faustino, y Douglas Melgar. Agroforestry and Soil Conservation: Adoption and Profitability in El Salvador. 1997.

警告：这些引文格式不一定是100％准确.