एपीए उद्धरण

Perkins, P. (1977). Repair, Proctection and Waterproofing of Concrete Structures (3rd ed.). E & FN Spon.

शिकागो स्टाइल उद्धरण

Perkins, P.H. Repair, Proctection and Waterproofing of Concrete Structures. 3rd ed. London: E & FN Spon, 1977.

एमएलए उद्धरण

Perkins, P.H. Repair, Proctection and Waterproofing of Concrete Structures. 3rd ed. E & FN Spon, 1977.