Παραπομπή σε μορφή APA (7η εκδ.)

Perez-Trejo, F. (1994). Desertification and land degradation in the European Mediterranean. European Commission : Office for Official Publications of the European Communities.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Perez-Trejo, Francisco. Desertification and Land Degradation in the European Mediterranean. Luxembourg: European Commission : Office for Official Publications of the European Communities, 1994.

Παραπομπή σε μορφή MLA (9th εκδ.)

Perez-Trejo, Francisco. Desertification and Land Degradation in the European Mediterranean. European Commission : Office for Official Publications of the European Communities, 1994.