Não informado. (2019). Nongsa Siheom Yeon'gu Nonmunjib. Nongcon Jinheung Ceong.
Chicago-viite (17. p.)Não informado. Nongsa Siheom Yeon'gu Nonmunjib. Suwon, Coreia do Sul: Nongcon Jinheung Ceong, 2019.
MLA-viite (8. p.)Não informado. Nongsa Siheom Yeon'gu Nonmunjib. Nongcon Jinheung Ceong, 2019.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.