"「日本軍の兵器1-13」試製九八式小型乗用車(陸王軽四起), 岡本軽四起, ダイハツ軽四起, 四式小型貨物車(トヨタAK-10)" ["Japanese Army Weapons 1-13" Trial Type 98 Small Passenger Car (Rikuo Light 4 Ki), Okamoto Light 4 Ki, Daihatsu Light 4 Ki, Type 4 Small Car (Toyota AK-10)] (in Japanese). Japan. Retrieved 21 November 2020.