Παραπομπή σε μορφή APA (7η εκδ.)

Kierkegaard, S., & Steere, D. V. (1956). Purity of heart is to will one thing: Spiritual preparation for the feast of confession. Harper & brothers.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Kierkegaard, Soren, και Douglas V. Steere. Purity of Heart Is to Will One Thing: Spiritual Preparation for the Feast of Confession. New York: Harper & brothers, 1956.

Παραπομπή σε μορφή MLA (9th εκδ.)

Kierkegaard, Soren, και Douglas V. Steere. Purity of Heart Is to Will One Thing: Spiritual Preparation for the Feast of Confession. Harper & brothers, 1956.