APA (7th ed.) Citation

Knirr, J. (1881). Das rechtwinklige rationale Dreieck.

Chicago Style (17th ed.) Citation

Knirr, Josef. Das Rechtwinklige Rationale Dreieck. Wien, 1881.

MLA (9th ed.) Citation

Knirr, Josef. Das Rechtwinklige Rationale Dreieck. 1881.