Gaya APA

S., L, M. (-1963). Letters, transl. by Brother Edmund Hunt C.S.C., (2nd pr). Copyright 1957. . Washington: CathUnivof America Press.

Gaya MLA

S., Leo, Magnus,. "Letters, transl. by Brother Edmund Hunt C.S.C., (2nd pr). Copyright 1957. ". Washington: CathUnivof America Press, -1963. Buku.