Gaya APA

Peurifoy, R, L., Ledbetter, W, B. (1985). Construction planning, equipment and methods / Robert L. Peurifoy, William B. Ledbetter (Ed.ke-4). : McGraw-Hill.

Gaya MLA

Peurifoy, Robert, L.., Ledbetter, William, B.. "Construction planning, equipment and methods / Robert L. Peurifoy, William B. Ledbetter". Ed.ke-4 : McGraw-Hill, 1985. Textbook.