APA (7th ed.) Citation

Jones, G. N., & Jones, F. F. (1943). A revision of the perennial species of Geranium of the United States and Canada. Zenodo.

Chicago Style (17th ed.) Citation

Jones, George Neville, and Florence Freeman Jones. A Revision of the Perennial Species of Geranium of the United States and Canada. Zenodo, 1943.

MLA (9th ed.) Citation

Jones, George Neville, and Florence Freeman Jones. A Revision of the Perennial Species of Geranium of the United States and Canada. Zenodo, 1943.