Langstaff, J. B. (1942). Doctor Bard of Hyde Park: The famous physician of revolutionary times, the man who saved Washington's life. New York: E.P. Dutton & Co., Inc..

Langstaff, John Brett. Doctor Bard of Hyde Park: The Famous Physician of Revolutionary Times, the Man Who Saved Washington's Life. New York: E.P. Dutton & Co., Inc., 1942.

Langstaff, John Brett. Doctor Bard of Hyde Park: The Famous Physician of Revolutionary Times, the Man Who Saved Washington's Life. New York: E.P. Dutton & Co., Inc., 1942.