Cita APA (7th ed.)

Eltringham, D. N. (1977). Imports and exports. Wheaton.

Cita Chicago (17th ed.)

Eltringham, Denham N. Imports and Exports. London: Wheaton, 1977.

Cita MLA (9th ed.)

Eltringham, Denham N. Imports and Exports. Wheaton, 1977.