APA (7th ed.) Citation

Held, L., & Knorr-Held, L. .

Chicago Style (17th ed.) Citation

Held, Leonhard, and Leonhard Knorr-Held. .

MLA (9th ed.) Citation

Held, Leonhard, and Leonhard Knorr-Held. .

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