Não informado. (1957). Canadian Journal of Soil Science. Agricultural Institute of Canada.
Chicago-viite (17. p.)Não informado. Canadian Journal of Soil Science. Ottawa: Agricultural Institute of Canada, 1957.
MLA-viite (8. p.)Não informado. Canadian Journal of Soil Science. Agricultural Institute of Canada, 1957.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.