APA-Zitierstil (7. Ausg.)

Mathias, M. E., Constance, L., & Theobald, W. L. (1969). Two new species of Umbelliferae from the southwestern United States ([Sonderdr.].).

Chicago-Zitierstil (17. Ausg.)

Mathias, Mildred E., Lincoln Constance, und William L. Theobald. Two New Species of Umbelliferae from the Southwestern United States. [Sonderdr.]. 1969.

MLA-Zitierstil (9. Ausg.)

Mathias, Mildred E., et al. Two New Species of Umbelliferae from the Southwestern United States. [Sonderdr.]. 1969.