Getis, A., Getis, J., Fellmann, J. D., Getis, V. L., & Malinowski, J. C. (2006). Introduction to geography (10th ed.). McGraw Hill Higher Education.

Getis, Arthur, Judith Getis, Jerome Donald Fellmann, Victoria L. Getis, and Jon C. Malinowski. Introduction to Geography. 10th ed. Boston: McGraw Hill Higher Education, 2006.

Getis, Arthur, et al. Introduction to Geography. 10th ed. McGraw Hill Higher Education, 2006.