Widawati, Mutiara and Riandi, Muhammad Umar  (2015) Study of Herbal Topical Repellent Made of Betel Leaves (Piper betle) and Patchouli Oil (Pogostemon cablin) Mixture Against Yellow Fever Mosquito (Aedes aegypti).  BIOTROPIA - The Southeast Asian Journal of Tropical Biology, 22 (1).   ISSN 0215-6334