APA (7th ed.) Citation

Grupenhoff, J. T., & Farley, B. (1983). National health directory. Aspen Publications.

Chicago Style (17th ed.) Citation

Grupenhoff, John T., and Betty Farley. National Health Directory. Rockville: Aspen Publications, 1983.

MLA (8th ed.) Citation

Grupenhoff, John T., and Betty Farley. National Health Directory. Aspen Publications, 1983.

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