APA
(1971). "IRC: 7-1971, RECOMMENDED PRACTICE FOR NUMBERING BRIDGES & CULVERTS (FIRST REVISION)". : INDIAN ROADS CONGRESS.
Chicago
1971. "IRC: 7-1971, RECOMMENDED PRACTICE FOR NUMBERING BRIDGES & CULVERTS (FIRST REVISION)". : INDIAN ROADS CONGRESS.
Harvard
(1971). "IRC: 7-1971, RECOMMENDED PRACTICE FOR NUMBERING BRIDGES & CULVERTS (FIRST REVISION)". : INDIAN ROADS CONGRESS.
MLA
"IRC: 7-1971, RECOMMENDED PRACTICE FOR NUMBERING BRIDGES & CULVERTS (FIRST REVISION)". : INDIAN ROADS CONGRESS. 1971.