United States. Bureau of Entomology. (1901). Some insects injurious to violet, rose, and other ornamental plants: Collection of articles dealing with insects of this class. GPO.
Chicago Style (17th ed.) CitationUnited States. Bureau of Entomology. Some Insects Injurious to Violet, Rose, and Other Ornamental Plants: Collection of Articles Dealing with Insects of This Class. [Washington]: GPO, 1901.
MLA (9th ed.) CitationUnited States. Bureau of Entomology. Some Insects Injurious to Violet, Rose, and Other Ornamental Plants: Collection of Articles Dealing with Insects of This Class. GPO, 1901.
Warning: These citations may not always be 100% accurate.