Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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