Robertson, C. (1928). Flowers and insects: Lists of visitors of four hundred and fifty-three flowers. [publisher not identified].
Chicago Style (17th ed.) CitationRobertson, Charles. Flowers and Insects: Lists of Visitors of Four Hundred and Fifty-three Flowers. Carlinville, Ill.: [publisher not identified], 1928.
MLA (9th ed.) CitationRobertson, Charles. Flowers and Insects: Lists of Visitors of Four Hundred and Fifty-three Flowers. [publisher not identified], 1928.
Warning: These citations may not always be 100% accurate.