Culbertson, R. E. (1936). Pyrethrum, a new crop. Chemical Industries., 38, 621.
Chicago Style (17th ed.) CitationCulbertson, R. E. "Pyrethrum, a New Crop." Chemical Industries. 38 (1936): 621.
MLA (9th ed.) CitationCulbertson, R. E. "Pyrethrum, a New Crop." Chemical Industries., vol. 38, 1936, p. 621.
Warning: These citations may not always be 100% accurate.