Howard, Thad M.. "Themidaceae". Bulbs for Warm Climates, New York, USA: University of Texas Press, 2001, pp. 211-225. https://doi.org/10.7560/731257-022
Howard, T. (2001). Themidaceae. In Bulbs for Warm Climates (pp. 211-225). New York, USA: University of Texas Press. https://doi.org/10.7560/731257-022
Howard, T. 2001. Themidaceae. Bulbs for Warm Climates. New York, USA: University of Texas Press, pp. 211-225. https://doi.org/10.7560/731257-022
Howard, Thad M.. "Themidaceae" In Bulbs for Warm Climates, 211-225. New York, USA: University of Texas Press, 2001. https://doi.org/10.7560/731257-022
Howard T. Themidaceae. In: Bulbs for Warm Climates. New York, USA: University of Texas Press; 2001. p.211-225. https://doi.org/10.7560/731257-022