Cita APA (7th ed.)

Robertson, D. (1972). Internationa trade policy (1st.). Sultan Chand & Co.

Cita Chicago (17th ed.)

Robertson, David. Internationa Trade Policy. 1st. Delhi: Sultan Chand & Co, 1972.

Cita MLA (9th ed.)

Robertson, David. Internationa Trade Policy. 1st. Sultan Chand & Co, 1972.