Cita APA (7th ed.)

Killough, H. B., & Killough, L. W. (1960). International economics. Van Nostrand.

Cita Chicago (17th ed.)

Killough, Hugh B., i Lucy W. Killough. International Economics. Princeton, N.J.: Van Nostrand, 1960.

Cita MLA (8th ed.)

Killough, Hugh B., i Lucy W. Killough. International Economics. Van Nostrand, 1960.