Παραπομπή APA

Willis, A. (1980). Practice and procedure for the quantity surveyor (8th Ed.). Granada.

Παραπομπή Chicago Style

Willis, Arthur.J. Practice and Procedure for the Quantity Surveyor. 8th Ed. London: Granada, 1980.

Παραπομπή MLA

Willis, Arthur.J. Practice and Procedure for the Quantity Surveyor. 8th Ed. Granada, 1980.