APA (7th ed.) Citation

Olson, W. (1974, July). Dusky-veined walnut aphid studies. California Agriculture.

Chicago Style (17th ed.) Citation

Olson, W. "Dusky-veined Walnut Aphid Studies." California Agriculture Jul. 1974.

MLA (9th ed.) Citation

Olson, W. "Dusky-veined Walnut Aphid Studies." California Agriculture, Jul. 1974.

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