Khanna B. P. I. A. G., . (1975). Practical costing. : S.Chand.
Khanna B.S Pandey I.M Ahuja G.K, . 1975. Practical costing. : S.Chand.
Khanna B.S Pandey I.M Ahuja G.K, . Practical costing. : S.Chand. 1975.