APA

Chuang T. I., Heckard L. R., . (1986). Systematics and evolution of cordylanthus (scrophulariaceae-pedicularieae). Michigan, United States: The American Society of Plant Taxonomists.

Chicago

Chuang Tsan Iang, Heckard Lawrence R, . 1986. Systematics and evolution of cordylanthus (scrophulariaceae-pedicularieae). Michigan, United States: The American Society of Plant Taxonomists.

Harvard

Chuang T. I., Heckard L. R., . (1986). Systematics and evolution of cordylanthus (scrophulariaceae-pedicularieae). Michigan, United States: The American Society of Plant Taxonomists.

MLA

Chuang Tsan Iang, Heckard Lawrence R, . Systematics and evolution of cordylanthus (scrophulariaceae-pedicularieae). Michigan, United States: The American Society of Plant Taxonomists. 1986.