Gaya APA
Yarnold, E, S.
(1984).
Eight days with the Lord, guidelines for a doit-yoruself retreat.
.
London:
CTS.
Gaya MLA
Yarnold, Edward,, S.J..
"Eight days with the Lord, guidelines for a doit-yoruself retreat. ".
London:
CTS,
1984.
Buku.