Singh, G., & Singh, J. (1993). Estimating costing and valuation. Standard Publishers Distributors.
Chicago (17e ed.) BronvermeldingSingh, Gurcharan, en Jagdish Singh. Estimating Costing and Valuation. India: Standard Publishers Distributors, 1993.
MLA (8e ed.) BronvermeldingSingh, Gurcharan, en Jagdish Singh. Estimating Costing and Valuation. Standard Publishers Distributors, 1993.
Let op: Deze citaties zijn niet altijd 100% accuraat.