Cita APA (7th ed.)
Abd-ru-shin. (1990). In the light of truth: The Grail message. Stiftung Gralsbotschaft Publishing Co.
Cita Chicago (17th ed.)
Abd-ru-shin. In the Light of Truth: The Grail Message. Stuttgart: Stiftung Gralsbotschaft Publishing Co, 1990.
Cita MLA (9th ed.)
Abd-ru-shin. In the Light of Truth: The Grail Message. Stiftung Gralsbotschaft Publishing Co, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.