APA (7th ed.) Citation

Sell, P., & Yeo, P. (1962). Some new North American Eyebrights Euphrasia ([Sonderdr.].).

Chicago Style (17th ed.) Citation

Sell, Peter, and Peter Yeo. Some New North American Eyebrights Euphrasia. [Sonderdr.]. 1962.

MLA (9th ed.) Citation

Sell, Peter, and Peter Yeo. Some New North American Eyebrights Euphrasia. [Sonderdr.]. 1962.

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