APA (7th ed.) Citation
(1990). A guide for approval of X-ray fluorescence analysis devices. [s.n.].
Chicago Style (17th ed.) Citation
A Guide for Approval of X-ray Fluorescence Analysis Devices. [s.l.]: [s.n.], 1990.
MLA (9th ed.) Citation
A Guide for Approval of X-ray Fluorescence Analysis Devices. [s.n.], 1990.
Warning: These citations may not always be 100% accurate.