Dalgado, Sebastião Rodolfo (1936). Portuguese Vocables in Asiatic Languages. Diterjemahkan oleh Xavier Soares, Anthony (ed.bahasa Inggeris). Baroda: Oriental Institute. m/s.275–276.
Chia, C. L.; Manshardt, Richard M. (Oktober 2001). "Why Some Papaya Plants Fail to Fruit"(PDF). Fruits and Nuts. College of Tropical Agriculture and Human Resources, University of Hawaii at Manoa: 1–2. Dicapai pada 22 Jun 2022.
Morton, Julia F. (1987). Fruits of warm climates. Miami, FL.: Purdue University Center for New Crops and Plant Products. m/s.336–346. Dicapai pada 25 Mei 2022.