APA
Commonwealth Association of Surveying and Land Economy, . (1969). First General Assembly, 15 - 20 December 1969, [Georgetown, Guyana]. London: CASLE.
Chicago
Commonwealth Association of Surveying and Land Economy, . 1969. First General Assembly, 15 - 20 December 1969, [Georgetown, Guyana]. London: CASLE.
Harvard
Commonwealth Association of Surveying and Land Economy, . (1969). First General Assembly, 15 - 20 December 1969, [Georgetown, Guyana]. London: CASLE.
MLA
Commonwealth Association of Surveying and Land Economy, . First General Assembly, 15 - 20 December 1969, [Georgetown, Guyana]. London: CASLE. 1969.
