University Microfilms, Xerox University Microfilms, & University Microfilms International. (1969). Dissertation abstracts international. University Microfilms International.
Chicago-viite (17. p.)University Microfilms, Xerox University Microfilms, ja University Microfilms International. Dissertation Abstracts International. Ann Arbor, Mich: University Microfilms International, 1969.
MLA-viite (9. p.)University Microfilms, et al. Dissertation Abstracts International. University Microfilms International, 1969.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.