Cita APA (7th ed.)
Spellman, F. R. (2009). Geography for nongeographers. Government Institutes.
Cita Chicago (17th ed.)
Spellman, Frank R. Geography for Nongeographers. Lanham: Government Institutes, 2009.
Cita MLA (9th ed.)
Spellman, Frank R. Geography for Nongeographers. Government Institutes, 2009.
Atenció: Aquestes cites poden no estar 100% correctes.