"Hakkımızda" [About us] (in Turkish). Retrieved May 13, 2018.
resemom.jp
Doi, Masami (April 19, 2019). "情報さえあれば世界は拓ける…松野知紀さんに聞く「地方公立でも勝つ法則」" [The world can be opened only if there is information: An interview with Tomoki Matsuno about public relations] (in Japanese). Retrieved May 13, 2019.