American Association of Nurserymen. (1990). Plant patent directory. American Association of Nurserymen.
Chicago Style (17th ed.) CitationAmerican Association of Nurserymen. Plant Patent Directory. Washington, D.C.: American Association of Nurserymen, 1990.
MLA (9th ed.) CitationAmerican Association of Nurserymen. Plant Patent Directory. American Association of Nurserymen, 1990.
Warning: These citations may not always be 100% accurate.