APA (7th ed.) Citation

Keck, D. D. (1937). Studies in Penstemon ([Sonderdr.].). Univ. of Calif. Pr.

Chicago Style (17th ed.) Citation

Keck, David D. Studies in Penstemon. [Sonderdr.]. Berkeley, Calif: Univ. of Calif. Pr, 1937.

MLA (9th ed.) Citation

Keck, David D. Studies in Penstemon. [Sonderdr.]. Univ. of Calif. Pr, 1937.

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