Παραπομπή σε μορφή APA (7η εκδ.)

(2017). Екологично инженерство и опазване на околната среда. National Society of Ecological Engineering and Environment Protection.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Екологично инженерство и опазване на околната среда. National Society of Ecological Engineering and Environment Protection, 2017.

Παραπομπή σε μορφή MLA (8th εκδ.)

Екологично инженерство и опазване на околната среда. National Society of Ecological Engineering and Environment Protection, 2017.