APA (7th ed.) Citation

Guenther, E. (1972). The essential oils. R. E. Krieger Pub. Co..

Chicago Style (17th ed.) Citation

Guenther, Ernest. The Essential Oils. Huntington, N.Y.: R. E. Krieger Pub. Co., 1972.

MLA (9th ed.) Citation

Guenther, Ernest. The Essential Oils. R. E. Krieger Pub. Co., 1972.