APA (7th ed.) Citation

Müller, D. H., & Fritz, J. (1976). Portale (o.A.). Prisma-Verlag.

Chicago Style (17th ed.) Citation

Müller, Dr. Hans, and Joachim Fritz. Portale. o.A. Leipzig: Prisma-Verlag, 1976.

MLA (8th ed.) Citation

Müller, Dr. Hans, and Joachim Fritz. Portale. o.A. Prisma-Verlag, 1976.

Warning: These citations may not always be 100% accurate.