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.