APA (7th ed.) Citation

Holttum, R. E., Sen, U., & Mittra, D. (1971). Studies in the family Thelypteridaceae ([Sonderdr.].).

Chicago Style (17th ed.) Citation

Holttum, Richard E., U. Sen, and D. Mittra. Studies in the Family Thelypteridaceae. [Sonderdr.]. 1971.

MLA (9th ed.) Citation

Holttum, Richard E., et al. Studies in the Family Thelypteridaceae. [Sonderdr.]. 1971.