APA (7th ed.) Citation

Babcock, E. B. (1947). The genus Crepis. [publisher not identified].

Chicago Style (17th ed.) Citation

Babcock, E. B. The Genus Crepis. Berkeley: [publisher not identified], 1947.

MLA (9th ed.) Citation

Babcock, E. B. The Genus Crepis. [publisher not identified], 1947.

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