DUTTA, B. N., & DUTTA, B. N. (1991). Estimating And Costing In Civil Engineering Theory And Practice Bn. Dutta. UBS Publishers' Distributors.
Chicago-viite (17. p.)DUTTA, B N., ja B N. DUTTA. Estimating And Costing In Civil Engineering Theory And Practice Bn. Dutta. UBS Publishers' Distributors, 1991.
MLA-viite (8. p.)DUTTA, B N., ja B N. DUTTA. Estimating And Costing In Civil Engineering Theory And Practice Bn. Dutta. UBS Publishers' Distributors, 1991.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.