Hodgson, Willard (1967–1989) [1943]. "Chapter 4: Horticultural Varieties of Citrus". In Webber, Herbert John; rev Walter Reuther and Harry W. Lawton (eds.). The Citrus Industry. Riverside, California: University of California Division of Agricultural Sciences. Archived from the original on February 5, 2012.
Hodgson, Willard (1967–1989) [1943]. "Chapter 4: Horticultural Varieties of Citrus". In Webber, Herbert John; rev Walter Reuther and Harry W. Lawton (eds.). The Citrus Industry. Riverside, California: University of California Division of Agricultural Sciences. Archived from the original on February 5, 2012.