Khanna B. P. L. A. G., . (1978). Practical costing. : S.Chand.
Khanna B.S Pandey L.L Ahuja G.K, . 1978. Practical costing. : S.Chand.
Khanna B.S Pandey L.L Ahuja G.K, . Practical costing. : S.Chand. 1978.