Não informado. Plant Immigrants. U.S. Department of Agriculture, Bureau of Plant Industry.
Citação do estilo Chicago (17ª ed.)Não informado. Plant Immigrants. Washington: U.S. Department of Agriculture, Bureau of Plant Industry.
Citação MLA (8ª ed.)Não informado. Plant Immigrants. U.S. Department of Agriculture, Bureau of Plant Industry.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.