APA (7th ed.) Citation

Wagner, W. H., Wagner, F. S., & Gómez P., L. D. (1977). An enigmatic Polypody fern from Cartago Costa Rica ([Sonderdr.].).

Chicago Style (17th ed.) Citation

Wagner, Warren H., Florence Signaigo Wagner, and Luis Diego Gómez P. An Enigmatic Polypody Fern from Cartago Costa Rica. [Sonderdr.]. 1977.

MLA (9th ed.) Citation

Wagner, Warren H., et al. An Enigmatic Polypody Fern from Cartago Costa Rica. [Sonderdr.]. 1977.