Clark, D. L. (1973). Plane and geodetic surveying. Volume two: Higher surveying (sixth edition.). Constable & Company Ltd.
Παραπομπή σε μορφή Chicago (17η εκδ.)Clark, Davide Late. Plane and Geodetic Surveying. Volume Two: Higher Surveying. sixth edition. London: Constable & Company Ltd, 1973.
Παραπομπή σε μορφή MLA (8th εκδ.)Clark, Davide Late. Plane and Geodetic Surveying. Volume Two: Higher Surveying. sixth edition. Constable & Company Ltd, 1973.
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