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.
Παραπομπή σε μορφή Chicago (17η εκδ.)Callahan, 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.
Παραπομπή σε μορφή MLA (8th εκδ.)Callahan, 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.