APA citiranje

Wolfe, A. D., Xiang, Q., & Kephart, S. R. (1998). Diploid hybrid speciation in Penstemon (Scrophulariaceae). The National Academy of Sciences.

Citação norma Chicago

Wolfe, Andrea D., Qiu-Yun Xiang, and Susan R. Kephart. Diploid Hybrid Speciation in Penstemon (Scrophulariaceae). The National Academy of Sciences, 1998.

MLA citiranje

Wolfe, Andrea D., Qiu-Yun Xiang, and Susan R. Kephart. Diploid Hybrid Speciation in Penstemon (Scrophulariaceae). The National Academy of Sciences, 1998.