APA
National council for cement and building materials, . (1998). Sixth ncb international seminar on cement and building materials. New Delhi: National council for cement and building materials.
Chicago
National council for cement and building materials, . 1998. Sixth ncb international seminar on cement and building materials. New Delhi: National council for cement and building materials.
Harvard
National council for cement and building materials, . (1998). Sixth ncb international seminar on cement and building materials. New Delhi: National council for cement and building materials.
MLA
National council for cement and building materials, . Sixth ncb international seminar on cement and building materials. New Delhi: National council for cement and building materials. 1998.
