Παραπομπή σε μορφή APA (7η εκδ.)

Haas, T. (2011). Improving natural resource management: Ecological and political models. John Wiley & Sons Inc..

Παραπομπή σε μορφή Chicago (17η εκδ.)

Haas, Timothy. Improving Natural Resource Management: Ecological and Political Models. Chichester, West Sussex: John Wiley & Sons Inc., 2011.

Παραπομπή σε μορφή MLA (9th εκδ.)

Haas, Timothy. Improving Natural Resource Management: Ecological and Political Models. John Wiley & Sons Inc., 2011.