Não informado. (1917). The Plant Disease Bulletin. Department of Agriculture, Division of Mycology and Disease Survey.
Chicago-Zitierstil (17. Ausg.)Não informado. The Plant Disease Bulletin. Washington: Department of Agriculture, Division of Mycology and Disease Survey, 1917.
MLA-Zitierstil (8. Ausg.)Não informado. The Plant Disease Bulletin. Department of Agriculture, Division of Mycology and Disease Survey, 1917.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.