APA (7th ed.) Citation
Gull, E. (1946). Perspektivlehre.
Chicago Style (17th ed.) Citation
Gull, Erhard. Perspektivlehre. Zurich: Verlag fur Architektur, 1946.
MLA (9th ed.) Citation
Gull, Erhard. Perspektivlehre. 1946.
Warning: These citations may not always be 100% accurate.