Segura, O. (2000). The payment system for environmental services is in danger.
استشهاد بنمط شيكاغوSegura, Olman. The Payment System for Environmental Services Is in Danger. 2000.
MLA استشهادSegura, Olman. The Payment System for Environmental Services Is in Danger. 2000.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.