Sarkar, S. L. (1969). Handbook for prestressed concrete bridges. Structural Engineering Research Centre.
Lua i Stíl Chicago (17ú heag.)Sarkar, Shondeep L. Handbook for Prestressed Concrete Bridges. Roorkee, U.P.: Structural Engineering Research Centre, 1969.
Lua MLA (8ú heag.)Sarkar, Shondeep L. Handbook for Prestressed Concrete Bridges. Structural Engineering Research Centre, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.