Self-directed study: experiments in higher education

Chicago citation style
Gruber, Howard E. Self-directed study: experiments in higher education. 1962. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/001068937. (Accessed December 13, 2018.)
APA citation style
Gruber, Howard E, (1962) Self-directed study: experiments in higher education. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/001068937
MLA citation style
Gruber, Howard E. Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/001068937>.
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