Heywood, I., Cornelius, S., & Carver, S. (2002). An introduction to Geographical Information Systems (2nd ed.). Pearson Education Limited.
Citace podle Chicago (17th ed.)Heywood, Ian, Sarah Cornelius, a Steve Carver. An Introduction to Geographical Information Systems. 2nd ed. Harlow, England: Pearson Education Limited, 2002.
Citace podle MLA (9th ed.)Heywood, Ian, et al. An Introduction to Geographical Information Systems. 2nd ed. Pearson Education Limited, 2002.
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