Gaya APA

Rulla, L, M, S, (, , , , ). (1971). Depth psychology and vocation, a psycho-social perspective. . Roma dsl: PUG dsl.

Gaya MLA

Rulla, Luigi, M.,, S.J., (1922-, , , , ). "Depth psychology and vocation, a psycho-social perspective. ". Roma dsl: PUG dsl, 1971. Buku.