Gibson, J. S. (1967). New frontiers in the social studies. Citation Press.
Chicago Style aipamenaGibson, John Schuyler. New Frontiers in the Social Studies. New York: Citation Press, 1967.
MLA aipamenaGibson, John Schuyler. New Frontiers in the Social Studies. Citation Press, 1967.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.