APA (7th ed.) Citation

Smith, J. F. (1994). Systematics of Columnea Section Pentadenia and Section Stygnanthe (Gesneriaceae). American Society of Plant Taxonomists.

Chicago Style (17th ed.) Citation

Smith, James F. Systematics of Columnea Section Pentadenia and Section Stygnanthe (Gesneriaceae). Ann Arbor, Mich.: American Society of Plant Taxonomists, 1994.

MLA (9th ed.) Citation

Smith, James F. Systematics of Columnea Section Pentadenia and Section Stygnanthe (Gesneriaceae). American Society of Plant Taxonomists, 1994.