Παραπομπή σε μορφή APA (7η εκδ.)

Barrabes, C., & Hogan, P. (2003). Singular null hypersurfaces in general relativity: Light-like signals from violent astrophysical events. World Scientific.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Barrabes, C., και P.A Hogan. Singular Null Hypersurfaces in General Relativity: Light-like Signals from Violent Astrophysical Events. New Jersey: World Scientific, 2003.

Παραπομπή σε μορφή MLA (8th εκδ.)

Barrabes, C., και P.A Hogan. Singular Null Hypersurfaces in General Relativity: Light-like Signals from Violent Astrophysical Events. World Scientific, 2003.