Παραπομπή σε μορφή APA (7η εκδ.)

Leal Filho, W. (2007). Higher education and the challenge of sustainability: Problems, promises and good practice. Environmental Education Center of Soufli.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Leal Filho, Walter. Higher Education and the Challenge of Sustainability: Problems, Promises and Good Practice. Soufli: Environmental Education Center of Soufli, 2007.

Παραπομπή σε μορφή MLA (9th εκδ.)

Leal Filho, Walter. Higher Education and the Challenge of Sustainability: Problems, Promises and Good Practice. Environmental Education Center of Soufli, 2007.