Betz, C. E. (1969). Principles of penetrants (2nd ed.). Magnaflux Corp..
Chicago Style (17th ed.) CitationBetz, Carl E. Principles of Penetrants. 2nd ed. Chicago, Ill.: Magnaflux Corp., 1969.
MLA (8th ed.) CitationBetz, Carl E. Principles of Penetrants. 2nd ed. Magnaflux Corp., 1969.
Warning: These citations may not always be 100% accurate.