Gaya APA

Kierkegaard, S, (. (1966). Purity of heart is to will one thing, spiritual preparation for the office of confession, transl. and with introd.by B.Steere, (repr.). - Fontana, 507 R. Copyright 1938 . London: Collins.

Gaya MLA

Kierkegaard, S., (1813-1855). "Purity of heart is to will one thing, spiritual preparation for the office of confession, transl. and with introd.by B.Steere, (repr.). - Fontana, 507 R. Copyright 1938". London: Collins, 1966. Buku.