Gaya APA

Elfick, M, H., Fryer, J, G. (1994). Elementary Surveying: S. I. Adaptation (8th Edition). United Kingdom: HarperCollins Publishers.

Gaya MLA

Elfick, Michael, H.., Fryer, John, G.. "Elementary Surveying: S. I. Adaptation". 8th Edition United Kingdom: HarperCollins Publishers, 1994. Text.