APA (7e ed.) Bronvermelding
(1980). Pocket Book Series of the Grail Message Foundation. The Grail Message Foundation Publ.
Chicago (17e ed.) Bronvermelding
Pocket Book Series of the Grail Message Foundation. Stuttgart: The Grail Message Foundation Publ, 1980.
MLA (9e ed.) Bronvermelding
Pocket Book Series of the Grail Message Foundation. The Grail Message Foundation Publ, 1980.
Let op: Deze citaties zijn niet altijd 100% accuraat.