1. Professionalisation;Vollmer,1966
2. The sequence of professionalization;Caplow,1966
3. Professionalism;Bell;Journal of Professional Issues in Engineering Education and Practice,1990
4. Practice of professionalism;Oates;Journal of Professional Issues in Engineering Education and Practice,1993
5. The development of the architectural profession in Britain: A Sociological study;Kaye,1960