Cita APA (7th ed.)
Yarotskaya, E. V. Geographical information systems: Study aid.
Cita Chicago (17th ed.)Yarotskaya, E. V. Geographical Information Systems: Study Aid.
Cita MLA (8th ed.)Yarotskaya, E. V. Geographical Information Systems: Study Aid.
Atenció: Aquestes cites poden no estar 100% correctes.