Lua APA (7ú heag.)
Singh, G., Singh, G., & Chander, S. (2007). Civil engineering drawing. New Delhi.
Lua i Stíl Chicago (17ú heag.)
Singh, Grucharan, Gurcharan Singh, agus Subhash Chander. Civil Engineering Drawing. Standard: New Delhi, 2007.
Lua MLA (9ú heag.)
Singh, Grucharan, et al. Civil Engineering Drawing. New Delhi, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.