Não informado. (1913). Journal of the American Society of Agronomy. American Society of Agronomy.
Chicago-viite (17. p.)Não informado. Journal of the American Society of Agronomy. Washington: American Society of Agronomy, 1913.
MLA-viite (8. p.)Não informado. Journal of the American Society of Agronomy. American Society of Agronomy, 1913.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.