Hui, Yiu H. (2006). "Pumpkins and Squashes". Handbook of Food Science, Technology, and Engineering. Vol. 1. Boca Raton, Florida: CRC Press. pp. 20–10. ISBN9781420027518.
"Zucchetta". Mount Vernon Northwestern Washington Research and Extension Center: Vegetable Research and Extension. Washington State University. Retrieved 10 May 2013.