Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

Killough, Hugh B., y Lucy W. Killough. International Economics. Princeton [etc.]: D. van Nostrand Company, 1960.

Cita MLA (9a ed.)

Killough, Hugh B., y Lucy W. Killough. International Economics. D. van Nostrand Company, 1960.