"Koitogawa". Nihon Rekishi Chimei Taikei (日本歴史地名大系 “Compendium of Japanese Historical Place Names”) (in Japanese). Tokyo: Netto Adobansusha. 2011. Archived from the original on 2007-08-25. Retrieved 2011-12-16.
"Koitogawa". Nihon Rekishi Chimei Taikei (日本歴史地名大系 “Compendium of Japanese Historical Place Names”) (in Japanese). Tokyo: Netto Adobansusha. 2011. Archived from the original on 2007-08-25. Retrieved 2011-12-16.
"Koito-gawa". Nihon Daihyakka Zensho (Nipponika) (日本大百科全書(ニッポニカ) “Encyclopedia of Japan (Nipponika)”). Tokyo: Netto Adobansusha. 2011. Archived from the original on 2007-08-25. Retrieved 2011-12-03.
"Koito-gawa". Nihon Daihyakka Zensho (Nipponika) (日本大百科全書(ニッポニカ) “Encyclopedia of Japan (Nipponika)”). Tokyo: Netto Adobansusha. 2011. Archived from the original on 2007-08-25. Retrieved 2011-12-03.
"Koitogawa". Nihon Rekishi Chimei Taikei (日本歴史地名大系 “Compendium of Japanese Historical Place Names”) (in Japanese). Tokyo: Netto Adobansusha. 2011. Archived from the original on 2007-08-25. Retrieved 2011-12-16.
"Koito-gawa". Nihon Daihyakka Zensho (Nipponika) (日本大百科全書(ニッポニカ) “Encyclopedia of Japan (Nipponika)”). Tokyo: Netto Adobansusha. 2011. Archived from the original on 2007-08-25. Retrieved 2011-12-03.
web.archive.org
"Koitogawa". Nihon Rekishi Chimei Taikei (日本歴史地名大系 “Compendium of Japanese Historical Place Names”) (in Japanese). Tokyo: Netto Adobansusha. 2011. Archived from the original on 2007-08-25. Retrieved 2011-12-16.
"Koitogawa". Nihon Rekishi Chimei Taikei (日本歴史地名大系 “Compendium of Japanese Historical Place Names”) (in Japanese). Tokyo: Netto Adobansusha. 2011. Archived from the original on 2007-08-25. Retrieved 2011-12-16.
"Koito-gawa". Nihon Daihyakka Zensho (Nipponika) (日本大百科全書(ニッポニカ) “Encyclopedia of Japan (Nipponika)”). Tokyo: Netto Adobansusha. 2011. Archived from the original on 2007-08-25. Retrieved 2011-12-03.
"Koito-gawa". Nihon Daihyakka Zensho (Nipponika) (日本大百科全書(ニッポニカ) “Encyclopedia of Japan (Nipponika)”). Tokyo: Netto Adobansusha. 2011. Archived from the original on 2007-08-25. Retrieved 2011-12-03.
"Koitogawa". Nihon Rekishi Chimei Taikei (日本歴史地名大系 “Compendium of Japanese Historical Place Names”) (in Japanese). Tokyo: Netto Adobansusha. 2011. Archived from the original on 2007-08-25. Retrieved 2011-12-16.
"Koito-gawa". Nihon Daihyakka Zensho (Nipponika) (日本大百科全書(ニッポニカ) “Encyclopedia of Japan (Nipponika)”). Tokyo: Netto Adobansusha. 2011. Archived from the original on 2007-08-25. Retrieved 2011-12-03.