Παραπομπή σε μορφή APA (7η εκδ.)

Achten, R. (1995). First principles and our way to faith: A fundamental-theological study of John Henry Newman's notion of first principles. P. Lang.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Achten, Rik. First Principles and Our Way to Faith: A Fundamental-theological Study of John Henry Newman's Notion of First Principles. Frankfurt am Main: P. Lang, 1995.

Παραπομπή σε μορφή MLA (8th εκδ.)

Achten, Rik. First Principles and Our Way to Faith: A Fundamental-theological Study of John Henry Newman's Notion of First Principles. P. Lang, 1995.