APA (7th ed.) Citation

Bartuszat, D., & Koch, F. (1975). Festigkeitslehre (o.A.).

Chicago Style (17th ed.) Citation

Bartuszat, D., and F. Koch. Festigkeitslehre. o.A. Köthen, 1975.

MLA (8th ed.) Citation

Bartuszat, D., and F. Koch. Festigkeitslehre. o.A. 1975.

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