APA (7th ed.) Citation

Heinzelmann, J., & Sprewitz, M. De Fortitudine.

Chicago Style (17th ed.) Citation

Heinzelmann, Johann, and Martin Sprewitz. De Fortitudine.

MLA (9th ed.) Citation

Heinzelmann, Johann, and Martin Sprewitz. De Fortitudine.

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