Cita APA (7th ed.)
Smith, W. R. (1993). Orchids of Minnesota. University of Minnesota Press.
Cita Chicago (17th ed.)
Smith, Welby R. Orchids of Minnesota. Minneapolis: University of Minnesota Press, 1993.
Cita MLA (9th ed.)
Smith, Welby R. Orchids of Minnesota. University of Minnesota Press, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.