APA
Commonwealth Association of Surveying and Land Economy, Headlam R., . (1987). The management and marketing of professional practices. London: CASLE.
Chicago
Commonwealth Association of Surveying and Land Economy, Headlam Robert, . 1987. The management and marketing of professional practices. London: CASLE.
Harvard
Commonwealth Association of Surveying and Land Economy, Headlam R., . (1987). The management and marketing of professional practices. London: CASLE.
MLA
Commonwealth Association of Surveying and Land Economy, Headlam Robert, . The management and marketing of professional practices. London: CASLE. 1987.
