GeoEco | Faculty of Teacher Training and Education, Universitas Sebelas Maret. Cambridge University Press.
Cita Chicago (17th ed.)GeoEco | Faculty of Teacher Training and Education, Universitas Sebelas Maret. Cambridge University Press.
Cita MLA (8th ed.)GeoEco | Faculty of Teacher Training and Education, Universitas Sebelas Maret. Cambridge University Press.
Atenció: Aquestes cites poden no estar 100% correctes.