Franklin

MLA

Severin, Gregory M. The Paris Codex : Decoding an Astronomical Ephemeris. Philadelphia, Pa.: American Philosophical Society, 1981.

APA

Severin, G. M. (1981). The Paris Codex : decoding an astronomical ephemeris. Philadelphia, Pa.: American Philosophical Society.

Chicago

Severin, Gregory M. The Paris Codex: Decoding an Astronomical Ephemeris. Philadelphia, Pa.: American Philosophical Society, 1981.