Cita APA (7a ed.)
Guenther, E. The Essential oils: History, origin in plants production, analysis. D. van Nostrand.
Cita estilo Chicago (17a ed.)
Guenther, Ernest. The Essential Oils: History, Origin in Plants Production, Analysis. Nueva York, EUA: D. van Nostrand.
Cita MLA (9a ed.)
Guenther, Ernest. The Essential Oils: History, Origin in Plants Production, Analysis. D. van Nostrand.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.