APA Style

Ernest Guenther, Ph.D.. (1948). THE ESSENTIAL OILS Vol. I (I). Canada: D. van Nostrand Company, Inc..

Chicago Style

Ernest Guenther, Ph.D.. THE ESSENTIAL OILS Vol. I. I Canada: D. van Nostrand Company, Inc., 1948. Text.

MLA Style

Ernest Guenther, Ph.D.. THE ESSENTIAL OILS Vol. I. I Canada: D. van Nostrand Company, Inc., 1948. Text.

Turabian Style

Ernest Guenther, Ph.D.. THE ESSENTIAL OILS Vol. I. I Canada: D. van Nostrand Company, Inc., 1948. Print.