Gelfenbien, G. P. (1987). Spheres of light: Light as the common element of the Byzantine East and the Gothic West. [publisher not identified].
Chicago Style (17th ed.) CitationGelfenbien, Gary Paul. Spheres of Light: Light as the Common Element of the Byzantine East and the Gothic West. [Place of publication not identified]: [publisher not identified], 1987.
MLA (9th ed.) CitationGelfenbien, Gary Paul. Spheres of Light: Light as the Common Element of the Byzantine East and the Gothic West. [publisher not identified], 1987.
Warning: These citations may not always be 100% accurate.