Morton, Julia Frances (1987). "Grapefruit, Citrus paradisi". Fruits of Warm Climates. NewCROP, New Crop Resource Online Program, Center for New Crops and Plant Products, Department of Horticulture and Landscape Architecture, Purdue University. m/s. 152–158. ISBN978-0-9610184-1-2. OCLC16947184.
worldcat.org
Morton, Julia Frances (1987). "Grapefruit, Citrus paradisi". Fruits of Warm Climates. NewCROP, New Crop Resource Online Program, Center for New Crops and Plant Products, Department of Horticulture and Landscape Architecture, Purdue University. m/s. 152–158. ISBN978-0-9610184-1-2. OCLC16947184.