Παραπομπή σε μορφή APA (7η εκδ.)

Leal Filho, W., Tahir, F., & Adomssent, M. (1998). Distance education and environmental education. Peter Lang.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Leal Filho, Walter, Farrukh Tahir, και Maik Adomssent. Distance Education and Environmental Education. Berlin: Peter Lang, 1998.

Παραπομπή σε μορφή MLA (9th εκδ.)

Leal Filho, Walter, et al. Distance Education and Environmental Education. Peter Lang, 1998.