Cita APA (7th ed.)

KILLOUGH, H. B., & KILLOUGH, L. W. (1948). Economics of international trade.-- ed.2. McGraw-hill.

Cita Chicago (17th ed.)

KILLOUGH, Hugh B., i Lucy W. KILLOUGH. Economics of International Trade.-- Ed.2. New York: McGraw-hill, 1948.

Cita MLA (9th ed.)

KILLOUGH, Hugh B., i Lucy W. KILLOUGH. Economics of International Trade.-- Ed.2. McGraw-hill, 1948.