Ashworth, A.. (2013). Willis's practice and procedure for the quantity surveyor (Thirteenth edition , Allan Ashworth, DUniv (Hon), MSc, University of Salford - Keith Hogg, BSc - Catherine Higgs, MSc, MRICS, University of the West of England, Bristol.). Wiley-Blackwell.
Chicago-Zitierstil (17. Ausg.)Ashworth, A. Willis's Practice and Procedure for the Quantity Surveyor. Thirteenth edition , Allan Ashworth, DUniv (Hon), MSc, University of Salford - Keith Hogg, BSc - Catherine Higgs, MSc, MRICS, University of the West of England, Bristol. Chichester, West Sussex, United Kingdom: Wiley-Blackwell, 2013.
MLA-Zitierstil (9. Ausg.)Ashworth, A. Willis's Practice and Procedure for the Quantity Surveyor. Thirteenth edition , Allan Ashworth, DUniv (Hon), MSc, University of Salford - Keith Hogg, BSc - Catherine Higgs, MSc, MRICS, University of the West of England, Bristol. Wiley-Blackwell, 2013.