Não informado. (1950). Tohoku Shikenjo Kenkyu Hokoku. Tohoku National Agricultural Experiment Station.
Chicago-viite (17. p.)Não informado. Tohoku Shikenjo Kenkyu Hokoku. Tohoku, Japão: Tohoku National Agricultural Experiment Station, 1950.
MLA-viite (8. p.)Não informado. Tohoku Shikenjo Kenkyu Hokoku. Tohoku National Agricultural Experiment Station, 1950.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.