Cita APA (7th ed.)

Jensen, J. R., & Jensen, R. R. (2013). Introductory geographic information systems (International ed.). Pearson.

Cita Chicago (17th ed.)

Jensen, John R., i Ryan R. Jensen. Introductory Geographic Information Systems. International ed. Boston: Pearson, 2013.

Cita MLA (9th ed.)

Jensen, John R., i Ryan R. Jensen. Introductory Geographic Information Systems. International ed. Pearson, 2013.