Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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