APA

Willis J. C., . (1966). Dictionary of the flowering plants and ferns. : CambridgeUniversity Press, Cambridge.

Chicago

Willis J C, . 1966. Dictionary of the flowering plants and ferns. : CambridgeUniversity Press, Cambridge.

Harvard

Willis J. C., . (1966). Dictionary of the flowering plants and ferns. : CambridgeUniversity Press, Cambridge.

MLA

Willis J C, . Dictionary of the flowering plants and ferns. : CambridgeUniversity Press, Cambridge. 1966.