Aguirre Rueda, J. A. (2015). School manuals for teaching geography at the Sovereign State of Santander: 1868-1879. Universidad Pedagógica y Tecnológica de Colombia.
Chicago Style (17. basım) AtıfAguirre Rueda, Jorge Alejandro. School Manuals for Teaching Geography at the Sovereign State of Santander: 1868-1879. Universidad Pedagógica y Tecnológica de Colombia, 2015.
MLA (9th ed.) AtıfAguirre Rueda, Jorge Alejandro. School Manuals for Teaching Geography at the Sovereign State of Santander: 1868-1879. Universidad Pedagógica y Tecnológica de Colombia, 2015.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..
