Παραπομπή σε μορφή APA (7η εκδ.)

McDonald, M. G., & Harbaugh, A. W. (1988). A modular three-dimensional finite-difference ground-water flow model. U. S. Department of the Interior.

Παραπομπή σε μορφή Chicago (17η εκδ.)

McDonald, Michael G., και Arlen W. Harbaugh. A Modular Three-dimensional Finite-difference Ground-water Flow Model. Washington: U. S. Department of the Interior, 1988.

Παραπομπή σε μορφή MLA (8th εκδ.)

McDonald, Michael G., και Arlen W. Harbaugh. A Modular Three-dimensional Finite-difference Ground-water Flow Model. U. S. Department of the Interior, 1988.