Παραπομπή σε μορφή APA (7η εκδ.)

Drewry Shipping Consultants. (1997). LPG shipping: Refocusing on growth. Drewry Shipping Consultants.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Drewry Shipping Consultants. LPG Shipping: Refocusing on Growth. London: Drewry Shipping Consultants, 1997.

Παραπομπή σε μορφή MLA (9th εκδ.)

Drewry Shipping Consultants. LPG Shipping: Refocusing on Growth. Drewry Shipping Consultants, 1997.