APA (7th ed.) Citation

Johnson, T., & Knowles, M. C. (1903). The Levinge herbarium.

Chicago Style (17th ed.) Citation

Johnson, T., and M. C. Knowles. The Levinge Herbarium. 1903.

MLA (9th ed.) Citation

Johnson, T., and M. C. Knowles. The Levinge Herbarium. 1903.

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