Cita APA (7th ed.)
Wirshing, J. R., & Wirshing, R. H. (1985). Theory and Problem of Introductory Surveying. McGraw-Hill.
Cita Chicago (17th ed.)
Wirshing, James R., i Roy H. Wirshing. Theory and Problem of Introductory Surveying. New York: McGraw-Hill, 1985.
Cita MLA (9th ed.)
Wirshing, James R., i Roy H. Wirshing. Theory and Problem of Introductory Surveying. McGraw-Hill, 1985.
Atenció: Aquestes cites poden no estar 100% correctes.