APA
Ptolemy, . (1952). Almagest: Revolutions of the heavenly spheres, Epitome of Coperincan astronomy. Chicago: William Benton.
Chicago
Ptolemy, . 1952. Almagest: Revolutions of the heavenly spheres, Epitome of Coperincan astronomy. Chicago: William Benton.
Harvard
Ptolemy, . (1952). Almagest: Revolutions of the heavenly spheres, Epitome of Coperincan astronomy. Chicago: William Benton.
MLA
Ptolemy, . Almagest: Revolutions of the heavenly spheres, Epitome of Coperincan astronomy. Chicago: William Benton. 1952.