APA (7th ed.) Citation

Bridson, D. M., Gasson, P., & Robbrecht, E. (1980). Phellocalyx, a new tropical African genus in Rubiaceae (Gardenieae) ([Sonderdr.].).

Chicago Style (17th ed.) Citation

Bridson, Diane M., P. Gasson, and Elmar Robbrecht. Phellocalyx, a New Tropical African Genus in Rubiaceae (Gardenieae). [Sonderdr.]. 1980.

MLA (9th ed.) Citation

Bridson, Diane M., et al. Phellocalyx, a New Tropical African Genus in Rubiaceae (Gardenieae). [Sonderdr.]. 1980.