APA (7th ed.) Citation

United States. Bureau of Plant Industry. (1920). Plant immigrants. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Bureau of Plant Industry. Plant Immigrants. [Washington]: [publisher not identified], 1920.

MLA (9th ed.) Citation

United States. Bureau of Plant Industry. Plant Immigrants. [publisher not identified], 1920.

Warning: These citations may not always be 100% accurate.