APA
The Secretariat for Promoting Christian Unity, . (1967). Information service. Rome: [s. n.].
Chicago
The Secretariat for Promoting Christian Unity, . 1967. Information service. Rome: [s. n.].
Harvard
The Secretariat for Promoting Christian Unity, . (1967). Information service. Rome: [s. n.].
MLA
The Secretariat for Promoting Christian Unity, . Information service. Rome: [s. n.]. 1967.
