Παραπομπή σε μορφή APA (7η εκδ.)

Γράτσος, Γ. Α. (2011). Freight markets signals: An internal view of dynamic forces that shape the dry bulk business. Sideris.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Γράτσος, Γεώργιος Α. Freight Markets Signals: An Internal View of Dynamic Forces That Shape the Dry Bulk Business. Athens: Sideris, 2011.

Παραπομπή σε μορφή MLA (9th εκδ.)

Γράτσος, Γεώργιος Α. Freight Markets Signals: An Internal View of Dynamic Forces That Shape the Dry Bulk Business. Sideris, 2011.