APA (7th ed.) Citation

Culbertson, R. E. (1936). Pyrethrum, a new crop. Chemical Industries., 38, 621.

Chicago Style (17th ed.) Citation

Culbertson, R. E. "Pyrethrum, a New Crop." Chemical Industries. 38 (1936): 621.

MLA (9th ed.) Citation

Culbertson, R. E. "Pyrethrum, a New Crop." Chemical Industries., vol. 38, 1936, p. 621.

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