Cita APA (7th ed.)

HELLER H ROBERT. (1988). INTERNATIONAL TRADE: THEORY AND EMPRICAL EVIDENCE (2.). PRENTICE -HALL INTERNATIONAL, INC.

Cita Chicago (17th ed.)

HELLER H ROBERT. INTERNATIONAL TRADE: THEORY AND EMPRICAL EVIDENCE. 2. NEW DELHI: PRENTICE -HALL INTERNATIONAL, INC, 1988.

Cita MLA (9th ed.)

HELLER H ROBERT. INTERNATIONAL TRADE: THEORY AND EMPRICAL EVIDENCE. 2. PRENTICE -HALL INTERNATIONAL, INC, 1988.