Gaya APA

Guardini, R. (1957). Prayer in practice, transl. from the German by Prince Leopold of Loewenstein-Wertheim. : Vorschule des Betens. . London: Burns & Oates.

Gaya MLA

Guardini, R.. "Prayer in practice, transl. from the German by Prince Leopold of Loewenstein-Wertheim. : Vorschule des Betens. ". London: Burns & Oates, 1957. Buku.