Παραπομπή σε μορφή APA (7η εκδ.)

Department of Agriculture. The Forests of western and central Ecuador: Ecuador supplies the world with balsa.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Department of Agriculture. The Forests of Western and Central Ecuador: Ecuador Supplies the World with Balsa.

Παραπομπή σε μορφή MLA (8th εκδ.)

Department of Agriculture. The Forests of Western and Central Ecuador: Ecuador Supplies the World with Balsa.