1. American Council for Construction Education (2000). Form 103—standards and criteria for baccalaureate programs. ( http://www.acce-hq.org/Accreditation/AccredProc.htm).
2. ASD Architectural Services Department (1990). Technical instruction 3/90—economic use of labour in projects.
3. Rebuilding construction;Ball,1988
4. Housing and construction;Ball,1996
5. Chasing a snail;Ball;Housing Studies,1999