Gaya APA

Arrupe, P. (1976). About the letter on the integration of spiritual life and apostolate. Genuine integration of the spiritual life and apostolate. . Rome: Rome Society of Jesus.

Gaya MLA

Arrupe, Pedro. "About the letter on the integration of spiritual life and apostolate. Genuine integration of the spiritual life and apostolate. ". Rome: Rome Society of Jesus, 1976. Buku.