東武30000系31606編成と31406編成が東上線へ [Tobu 30000 series sets 31606 and 31406 transferred to the Tojo Line]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 24 January 2020. Archived from the original on 26 January 2022. Retrieved 26 January 2022.
東武30000系31601編成+31401編成が森林公園検修区へ [Tobu 30000 series sets 31601 and 31401 move to Shinrinkōen Depot]. Japan Railfan Magazine Online (in Japanese). Koyusha Co., Ltd. 27 January 2011. Archived from the original on 29 January 2011. Retrieved 28 January 2011.
toyokeizai.net
Keiju, Osano (19 September 2021). "東上線でも大活躍、「転勤族」東武30000系の半生" [The double-life of the Tobu 30000 series]. Toyo Keizai Online (in Japanese). Archived from the original on 27 January 2023. Retrieved 6 December 2022.
web.archive.org
東武30000系31606編成と31406編成が東上線へ [Tobu 30000 series sets 31606 and 31406 transferred to the Tojo Line]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 24 January 2020. Archived from the original on 26 January 2022. Retrieved 26 January 2022.
Keiju, Osano (19 September 2021). "東上線でも大活躍、「転勤族」東武30000系の半生" [The double-life of the Tobu 30000 series]. Toyo Keizai Online (in Japanese). Archived from the original on 27 January 2023. Retrieved 6 December 2022.
東武30000系31601編成+31401編成が森林公園検修区へ [Tobu 30000 series sets 31601 and 31401 move to Shinrinkōen Depot]. Japan Railfan Magazine Online (in Japanese). Koyusha Co., Ltd. 27 January 2011. Archived from the original on 29 January 2011. Retrieved 28 January 2011.