ASHWORTH, A. H. (2013). Willis's practice and procedure for the quantity surveyor. John Wiley & Sons.
Chicago-čujuhus (17. p.)ASHWORTH, Allan Hogg. Willis's Practice and Procedure for the Quantity Surveyor. John Wiley & Sons, 2013.
MLA-čujuhus (9. p.)ASHWORTH, Allan Hogg. Willis's Practice and Procedure for the Quantity Surveyor. John Wiley & Sons, 2013.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.