Paul VI, P. (1968). The Holy Father's message for world communications day, May 26, 1968. [publisher not identified].
Dyfyniad Arddull ChicagoPaul VI, Pope. The Holy Father's Message for World Communications Day, May 26, 1968. [Place of publication not identified]: [publisher not identified], 1968.
Dyfyniad MLAPaul VI, Pope. The Holy Father's Message for World Communications Day, May 26, 1968. [publisher not identified], 1968.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.