Παραπομπή APA

Pierce, W. G., Denson, N. M., Toenges, A. L., & Καραβίδας, Ι. (1950). The lignite problem in Greece. Athens: Ministry of Coordination. Greek Recovery Program Coordinating Office.

Παραπομπή Chicago Style

Pierce, W. G., N. M. Denson, A. L. Toenges, and Ιωάννης Καραβίδας. The Lignite Problem in Greece. Athens: Ministry of Coordination. Greek Recovery Program Coordinating Office, 1950.

Παραπομπή MLA

Pierce, W. G., N. M. Denson, A. L. Toenges, and Ιωάννης Καραβίδας. The Lignite Problem in Greece. Athens: Ministry of Coordination. Greek Recovery Program Coordinating Office, 1950.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.