APA (7th ed.) Citation

Crawford, H. J. (1933). Insecticidal value of extracts of Cracca virginiana Linn. [publisher not identified].

Chicago Style (17th ed.) Citation

Crawford, Harvey James. Insecticidal Value of Extracts of Cracca Virginiana Linn. (College Station, Texas): [publisher not identified], 1933.

MLA (9th ed.) Citation

Crawford, Harvey James. Insecticidal Value of Extracts of Cracca Virginiana Linn. [publisher not identified], 1933.