APA引文

Segura, O. (2000). The payment system for environmental services is in danger.

Citación estilo Chicago

Segura, Olman. The Payment System for Environmental Services Is in Danger. 2000.

MLA引文

Segura, Olman. The Payment System for Environmental Services Is in Danger. 2000.

警告：这些引文格式不一定是100％准确.