APA
Ashworth A., . (1991). Contractual procedures in the construction industry. Harlow, Essex: Longman Scientific & Technical.
Chicago
Ashworth Allan, . 1991. Contractual procedures in the construction industry. Harlow, Essex: Longman Scientific & Technical.
Harvard
Ashworth A., . (1991). Contractual procedures in the construction industry. Harlow, Essex: Longman Scientific & Technical.
MLA
Ashworth Allan, . Contractual procedures in the construction industry. Harlow, Essex: Longman Scientific & Technical. 1991.