Nigam, B. M. L., & Sharma, G. L. (1981). Practical costing. Himalaya.
Chicago Style aipamenaNigam, B. M. Lall, and G. L. Sharma. Practical Costing. Bombay: Himalaya, 1981.
MLA aipamenaNigam, B. M. Lall, and G. L. Sharma. Practical Costing. Himalaya, 1981.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.