Merk, O. (2017). Geopolitics and commercial seaports.
Cita Chicago (17th ed.)Merk, Olaf. Geopolitics and Commercial Seaports. 2017.
Cita MLA (8th ed.)Merk, Olaf. Geopolitics and Commercial Seaports. 2017.
Atenció: Aquestes cites poden no estar 100% correctes.