United Nations Industrial Development Organization. (1981). Information sources on essential oils. United Nations.
Cita Chicago (17th ed.)United Nations Industrial Development Organization. Information Sources on Essential Oils. New York: United Nations, 1981.
Cita MLA (9th ed.)United Nations Industrial Development Organization. Information Sources on Essential Oils. United Nations, 1981.
Atenció: Aquestes cites poden no estar 100% correctes.