APA (7th ed.) Citation

Tomlinson, R. F., Calkins, H. W., & Marble, D. F. (1976). Computer handling of geographical data: An examination of selected geographic information systems. Unesco.

Chicago Style (17th ed.) Citation

Tomlinson, Roger F., H. W. Calkins, and Duane Francis Marble. Computer Handling of Geographical Data: An Examination of Selected Geographic Information Systems. Paris: Unesco, 1976.

MLA (9th ed.) Citation

Tomlinson, Roger F., et al. Computer Handling of Geographical Data: An Examination of Selected Geographic Information Systems. Unesco, 1976.