APA

Thoman R. S., . (1956). Free ports and foreign-trade zones. : Cornell Maritime Press.

Chicago

Thoman Richard S, . 1956. Free ports and foreign-trade zones. : Cornell Maritime Press.

Harvard

Thoman R. S., . (1956). Free ports and foreign-trade zones. : Cornell Maritime Press.

MLA

Thoman Richard S, . Free ports and foreign-trade zones. : Cornell Maritime Press. 1956.