Não informado. (1960). Canadian plant disease survey. Plant Research Institute, Department of Agriculture.
Citação do estilo Chicago (17ª ed.)Não informado. Canadian Plant Disease Survey. Ottawa: Plant Research Institute, Department of Agriculture, 1960.
Citação MLA (8ª ed.)Não informado. Canadian Plant Disease Survey. Plant Research Institute, Department of Agriculture, 1960.
Atenció: Aquestes cites poden no estar 100% correctes.