Peurifoy, R. L. (1989). Estimating Construction Costs R.l. Peurifoy, G.d. Oberlender. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Peurifoy, R. L. Estimating Construction Costs R.l. Peurifoy, G.d. Oberlender. McGraw-Hill, 1989.
Lua MLA (8ú heag.)Peurifoy, R. L. Estimating Construction Costs R.l. Peurifoy, G.d. Oberlender. McGraw-Hill, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.