Singh, H., & Ram, P. (1990). Sales and export management. Anuoam.
Chicago Style aipamenaSingh, Harkishan, and Paras Ram. Sales and Export Management. New Delhi: Anuoam, 1990.
MLA aipamenaSingh, Harkishan, and Paras Ram. Sales and Export Management. Anuoam, 1990.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.