Não informado. (1966). Investigaciones educativas en america. Pan American Union, Department of Educational Affairs.
Chicago-Zitierstil (17. Ausg.)Não informado. Investigaciones Educativas En America. Washington: Pan American Union, Department of Educational Affairs, 1966.
MLA-Zitierstil (8. Ausg.)Não informado. Investigaciones Educativas En America. Pan American Union, Department of Educational Affairs, 1966.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.