APA (7th ed.) Citation

Ptolemy, a. 2. c., Nicolaus Germanus, a. 1. c., & Schnitzer, J. (2015). [Ptolemy's world map, 1482]. [publisher not identified].

Chicago Style (17th ed.) Citation

Ptolemy, active 2nd century, active 15th century Nicolaus Germanus, and Johannes Schnitzer. [Ptolemy's World Map, 1482]. [Place of publication not identified]: [publisher not identified], 2015.

MLA (9th ed.) Citation

Ptolemy, active 2nd century, et al. [Ptolemy's World Map, 1482]. [publisher not identified], 2015.