References
- Buisson , D. H. 1979 . “ Potential crops for processing in New Zealand. III ” . In Herbs, spices and essential oils , Petone, , New Zealand : Industrial Processing Division, Department of Scientific and Industrial Research . Report no. IPD/IS/10
- Guenther , Ernest . 1949 . “ The essential oils ” . In Individual essential oils of the plant families Rutaceae and Labiatae, (Sixth printing) , Vol. 3 , 460 – 461 . Princeton : U.S.A. D. Van Norstrand Company Inc. .