APA (7th ed.) Citation

Guenther, E., & Althausen, D. (1955). The essential oils (3. print.). Van Nostrand.

Chicago Style (17th ed.) Citation

Guenther, Ernest, and Darrell Althausen. The Essential Oils. 3. print. New York [u.a.]: Van Nostrand, 1955.

MLA (9th ed.) Citation

Guenther, Ernest, and Darrell Althausen. The Essential Oils. 3. print. Van Nostrand, 1955.