APA (7th ed.) Citation

Boer, A. F. d. (1959). Ornamental crab apples. American Association of Nurserymen.

Chicago Style (17th ed.) Citation

Boer, Arie F. den. Ornamental Crab Apples. [Washington]: American Association of Nurserymen, 1959.

MLA (9th ed.) Citation

Boer, Arie F. den. Ornamental Crab Apples. American Association of Nurserymen, 1959.

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