Plants, I. U. f. t. P. o. N. V. o. (1999). Guidelines for the conduct of tests for distinctness, uniformity and stability: Walnut (Juglans regia L.). Geneva : UPOV.
Chicago Style (17th ed.) CitationPlants, International Union for the Protection of New Varieties of. Guidelines for the Conduct of Tests for Distinctness, Uniformity and Stability: Walnut (Juglans Regia L.). Geneva : UPOV, 1999.
MLA (8th ed.) CitationPlants, International Union for the Protection of New Varieties of. Guidelines for the Conduct of Tests for Distinctness, Uniformity and Stability: Walnut (Juglans Regia L.). Geneva : UPOV, 1999.
IICA/CATIE CitationPlants, I. U. f. t. P. o. N. V. o. 1999. Guidelines for the conduct of tests for distinctness, uniformity and stability: Walnut (Juglans regia L.). Geneva : UPOV.