APA (7th ed.) Citation

Dittberner, P. L. (1999). Echinacea: How much is enough? [U.S. Bureau of Land Management, National Applied Resource Sciences Center].

Chicago Style (17th ed.) Citation

Dittberner, Phillip L. Echinacea: How Much Is Enough? [Denver, Colorado]: [U.S. Bureau of Land Management, National Applied Resource Sciences Center], 1999.

MLA (9th ed.) Citation

Dittberner, Phillip L. Echinacea: How Much Is Enough? [U.S. Bureau of Land Management, National Applied Resource Sciences Center], 1999.