Aguirre Rueda, J. A. (2015). School manuals for teaching geography at the Sovereign State of Santander: 1868-1879. Universidad Pedagógica y Tecnológica de Colombia.
Čikaški stil citiranja (17. izdanje)Aguirre Rueda, Jorge Alejandro. School Manuals for Teaching Geography at the Sovereign State of Santander: 1868-1879. Universidad Pedagógica y Tecnológica de Colombia, 2015.
MLA način citiranja (9. izdanje)Aguirre Rueda, Jorge Alejandro. School Manuals for Teaching Geography at the Sovereign State of Santander: 1868-1879. Universidad Pedagógica y Tecnológica de Colombia, 2015.
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