Gaya APA

Peurifoy, R, L., Oberlender, G, D. (2002). Estimating Construction Costs (5th. Ed). Singapore: McGraw Hill.

Gaya MLA

Peurifoy, Robert, L.., Oberlender, Garold, D.. "Estimating Construction Costs". 5th. Ed Singapore: McGraw Hill, 2002. Text.