APA (7th ed.) Citation

Herold, W., & Herold, W. (1931). Optische Untersuchungen am System Aldehyd-Alkohol.

Chicago Style (17th ed.) Citation

Herold, Willy, and Willy Herold. Optische Untersuchungen Am System Aldehyd-Alkohol. 1931.

MLA (9th ed.) Citation

Herold, Willy, and Willy Herold. Optische Untersuchungen Am System Aldehyd-Alkohol. 1931.

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