Gaya APA

Clendinning, J, O, J. (1975). Principles of Surveying Third Edition . New York: Van Nostrand Reinhold Comp..

Gaya MLA

Clendinning, J.&, Olliver,, J.G.. "Principles of Surveying Third Edition". New York: Van Nostrand Reinhold Comp., 1975. Text.