Gaya APA

Roothaan, J. (-1957). How to meditate. Transl. from the Latin by L.J. Puhl, S.J., (4th pr.). : De ratione meditandi. 1945 . StMeinrad (Indiana): Grail Publications.

Gaya MLA

Roothaan, J.P.. "How to meditate. Transl. from the Latin by L.J. Puhl, S.J., (4th pr.). : De ratione meditandi. 1945 ". StMeinrad (Indiana): Grail Publications, -1957. Buku.