APA (7th ed.) Citation

Headstrom, R. (1978). The families of flowering plants. A. S. Barnes.

Chicago Style (17th ed.) Citation

Headstrom, Richard. The Families of Flowering Plants. South Brunswick, [N.J.]: A. S. Barnes, 1978.

MLA (9th ed.) Citation

Headstrom, Richard. The Families of Flowering Plants. A. S. Barnes, 1978.