APA-Zitierstil (7. Ausg.)

Não informado. (1891). Contributions from the Gray Herbarium of Harvard University. Harvard University.

Chicago-Zitierstil (17. Ausg.)

Não informado. Contributions from the Gray Herbarium of Harvard University. Cambridge, Mass: Harvard University, 1891.

MLA-Zitierstil (8. Ausg.)

Não informado. Contributions from the Gray Herbarium of Harvard University. Harvard University, 1891.

Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.