Harbin, A. L. (1989). Land surveyor reference manual (2nd ed.). Professional Publications.
Chicago Style aipamenaHarbin, Andrew L. Land Surveyor Reference Manual. 2nd ed. Belmont, CA: Professional Publications, 1989.
MLA aipamenaHarbin, Andrew L. Land Surveyor Reference Manual. 2nd ed. Professional Publications, 1989.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.