(1921). [Directory of personnel and hospitals of Public Health Service requested]. [publisher not identified].
Chicago Style (17th ed.) Citation[Directory of Personnel and Hospitals of Public Health Service Requested]. Washington, D.C.: [publisher not identified], 1921.
MLA (9th ed.) Citation[Directory of Personnel and Hospitals of Public Health Service Requested]. [publisher not identified], 1921.
Warning: These citations may not always be 100% accurate.