Higgins, E. B. (1949). Annotated distributional list of the ferns and flowering plants of San Diego County, California by Ethel Bailey Higgins. San Diego Society of Natural History.
Chicago Style (17th ed.) CitationHiggins, Ethel Bailey. Annotated Distributional List of the Ferns and Flowering Plants of San Diego County, California by Ethel Bailey Higgins. San Diego, California: San Diego Society of Natural History, 1949.
MLA (9th ed.) CitationHiggins, Ethel Bailey. Annotated Distributional List of the Ferns and Flowering Plants of San Diego County, California by Ethel Bailey Higgins. San Diego Society of Natural History, 1949.
Warning: These citations may not always be 100% accurate.