Sears, F. W. (1964). Quantitative Geography: Techniques and Theories in Geography. Addison-Wesley.
Chicago-viite (17. p.)Sears, Francis Weston. Quantitative Geography: Techniques and Theories in Geography. USA: Addison-Wesley, 1964.
MLA-viite (9. p.)Sears, Francis Weston. Quantitative Geography: Techniques and Theories in Geography. Addison-Wesley, 1964.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.