Nogata, Yoichi; Sakamoto, Koji; Shiratsuchi, Hiroyuki; Ishii, Toshinao; Yaho, Masamichi; Ohta, Hideaki (2006). "Flavonoid Composition of Fruit Tissues of Citrus Species". Bioscience, Biotechnology, and Biochemistry. 7 (1): 178–192. Diarkibkan daripada yang asal pada 28 Mei 2007. Dicapai pada 19 Januari 2015.
Wilkinson, Richard James (1932). "jĕrok". A Malay-English dictionary (romanised). I. Mytilini, Yunani: Salavopoulos & Kinderlis. m/s. 468 – melalui TROVE, Perpustakaan Negara Australia.
rogerblench.info
Blench, Roger (2008). "A history of fruits on the Southeast Asian mainland"(PDF). Occasional Paper 4: Linguistics, Archaeology and the Human Past. Cambridge, United Kingdom: Kay Williamson Educational Foundation: 115–137. Dicapai pada 19 Januari 2015.
Blust, Robert; Trussel, Stephen (2010). "*limaw — lime, citrus fruit". Austronesian Comparative Dictionary. Dicapai pada 19 Januari 2015.
unctad.org
United Nations Conference on Trade and Development. Market Information in the Commodities Area: Citrus fruits [1]
web.archive.org
Nogata, Yoichi; Sakamoto, Koji; Shiratsuchi, Hiroyuki; Ishii, Toshinao; Yaho, Masamichi; Ohta, Hideaki (2006). "Flavonoid Composition of Fruit Tissues of Citrus Species". Bioscience, Biotechnology, and Biochemistry. 7 (1): 178–192. Diarkibkan daripada yang asal pada 28 Mei 2007. Dicapai pada 19 Januari 2015.
