Cita APA (7a ed.)

(1989). Dissertation abstracts ondisc. University Microfilms International.

Cita Chicago Style (17a ed.)

Dissertation Abstracts Ondisc. Ann Arbor: University Microfilms International, 1989.

Cita MLA (9a ed.)

Dissertation Abstracts Ondisc. University Microfilms International, 1989.