Callahan, R. B. (2014). Private college enrollment in the Midwest: An exploration of significant growth within a 10-year period : submitted to Northcentral University in partial fulfillment of the requirements for the degree of Doctor of Philosophy. ProQuest.
Chicago Style (17. basım) AtıfCallahan, Robert B. Private College Enrollment in the Midwest: An Exploration of Significant Growth Within a 10-year Period : Submitted to Northcentral University in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy. Ann Arbor, MI: ProQuest, 2014.
MLA (8th ed.) AtıfCallahan, Robert B. Private College Enrollment in the Midwest: An Exploration of Significant Growth Within a 10-year Period : Submitted to Northcentral University in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy. ProQuest, 2014.