Παραπομπή σε μορφή APA (7η εκδ.)

Willis, A. J., & Willis, C. J. (1972). Practice and procedure for the quantity surveyor (6th ed. (metric).). Lockwood.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Willis, Arthur James, και Christopher James Willis. Practice and Procedure for the Quantity Surveyor. 6th ed. (metric). London: Lockwood, 1972.

Παραπομπή σε μορφή MLA (9th εκδ.)

Willis, Arthur James, και Christopher James Willis. Practice and Procedure for the Quantity Surveyor. 6th ed. (metric). Lockwood, 1972.