N. A. Ashford and R. P. Hall. Yale University Press (2011).
Ashford, Nicholas A., and Charles C. Caldart. Washington D.C.: Island Press, 1996.
Ashford, Nicholas A. Clinical Chemistry Vol. 40, No. 7 (1994): 1426-1437.
Ashford, Nicholas A., Christine J. Spadafor, Dale B. Hattis and Charles C. Caldart. Baltimore, MD: The John Hopkins University Press, 1990.
Ashford, Nicholas A., and Charles C. Caldart. Berkeley Journal of Employment & Labor Law Vol. 5, No. 4 (1983): 523-563.
Ashford, Nicholas A., and Judith I. Katz. Notre Dame Lawyer Vol. 52, No. 5 (1977): 802-837.