Cita APA (7th ed.)

Bracken, I., & Webster, C. (1990). Information technology in geography and planning: Including principles of GIS. Routledge.

Cita Chicago (17th ed.)

Bracken, Ian, i Christopher Webster. Information Technology in Geography and Planning: Including Principles of GIS. London ; New York: Routledge, 1990.

Cita MLA (8th ed.)

Bracken, Ian, i Christopher Webster. Information Technology in Geography and Planning: Including Principles of GIS. Routledge, 1990.