Gaya APA

Ball, J, M., Steinbrink, J, E. (1971). The social science and geographic education : a reader . New York: John Wiley \\n Sons.

Gaya MLA

Ball, John, M.., Steinbrink, John, E.. "The social science and geographic education : a reader". New York: John Wiley \\n Sons, 1971. Text.