Hutchinson, J. (1967). Key to the families of flowering plants of the world (Revised and enlarged for use as a supplement to The genera of flowering plants.). Clarendon P..

Hutchinson, J. Key to the Families of Flowering Plants of the World. Revised and enlarged for use as a supplement to The genera of flowering plants. Oxford: Clarendon P., 1967.

Hutchinson, J. Key to the Families of Flowering Plants of the World. Revised and enlarged for use as a supplement to The genera of flowering plants. Clarendon P., 1967.