APA (7th ed.) Citation

Gray, A. (1886). Memoranda of a Revision of the North American Violets. II. Zenodo.

Chicago Style (17th ed.) Citation

Gray, Asa. Memoranda of a Revision of the North American Violets. II. Zenodo, 1886.

MLA (9th ed.) Citation

Gray, Asa. Memoranda of a Revision of the North American Violets. II. Zenodo, 1886.

Warning: These citations may not always be 100% accurate.