Παραπομπή APA

Krypton, C. (1956). Northern sea route: And the economy of the Soviet North. methuen & Co.

Παραπομπή Chicago Style

Krypton, Constantine. Northern Sea Route: And the Economy of the Soviet North. London: methuen & Co, 1956.

Παραπομπή MLA

Krypton, Constantine. Northern Sea Route: And the Economy of the Soviet North. methuen & Co, 1956.