APA (7th ed.) Citation

Wiersema, J. H. (1987). A monograph of Nymphaea subgenus Hydrocallis (Nymphaeaceae). The American Society of Plant Taxonomists.

Chicago Style (17th ed.) Citation

Wiersema, John Harry. A Monograph of Nymphaea Subgenus Hydrocallis (Nymphaeaceae). [Ann Arbor, Mich.]: The American Society of Plant Taxonomists, 1987.

MLA (9th ed.) Citation

Wiersema, John Harry. A Monograph of Nymphaea Subgenus Hydrocallis (Nymphaeaceae). The American Society of Plant Taxonomists, 1987.