Willis, A. J., & Willis, C. J. (1972). Practice and procedure for the quantity surveyor (6th ed. (metric).). Lockwood.
Citace podle Chicago (17th ed.)Willis, Arthur James, a Christopher James Willis. Practice and Procedure for the Quantity Surveyor. 6th ed. (metric). London: Lockwood, 1972.
Citace podle MLA (9th ed.)Willis, Arthur James, a Christopher James Willis. Practice and Procedure for the Quantity Surveyor. 6th ed. (metric). Lockwood, 1972.
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