APA (7th ed.) Citation

(1920). Letter of instruction for monthly x-ray report. [publisher not identified].

Chicago Style (17th ed.) Citation

Letter of Instruction for Monthly X-ray Report. Washington, D.C.: [publisher not identified], 1920.

MLA (9th ed.) Citation

Letter of Instruction for Monthly X-ray Report. [publisher not identified], 1920.

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