Gaya APA

Speyr, A, V. (1979). They followed His call. Vocation and ascetism, transl. E.Leiva. : Sie folgten Seinem Ruf.1955. . Staten Island: Alba House.

Gaya MLA

Speyr, Andrienne, Von.. "They followed His call. Vocation and ascetism, transl. E.Leiva. : Sie folgten Seinem Ruf.1955. ". Staten Island: Alba House, 1979. Buku.