APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Killough, Hugh B., and Lucy W. Killough. International Economics. Princeton, N.J: van Nostrand, 1960.

MLA (9th ed.) Citation

Killough, Hugh B., and Lucy W. Killough. International Economics. van Nostrand, 1960.