APA-Zitierstil (7. Ausg.)

Torrey, J., & Gray, A. A flora of North America: containing abridged descriptions of all the known-indigenous and naturalized plants growing north of Mexico: Arranged according to the natural system.

Chicago-Zitierstil (17. Ausg.)

Torrey, John, und Asa Gray. A Flora of North America: Containing Abridged Descriptions of All the Known-indigenous and Naturalized Plants Growing North of Mexico: Arranged According to the Natural System. New York u.a.

MLA-Zitierstil (9. Ausg.)

Torrey, John, und Asa Gray. A Flora of North America: Containing Abridged Descriptions of All the Known-indigenous and Naturalized Plants Growing North of Mexico: Arranged According to the Natural System.