Gaya APA

Ghilani, C, D., Wolf, P, R. (2008). Elementary surveying: an introduction to geomatics (12th ed.). USA: Pearson Education.

Gaya MLA

Ghilani, Charles, D.., Wolf, Paul, R.. "Elementary surveying: an introduction to geomatics". 12th ed. USA: Pearson Education, 2008. Text.