Lua APA (7ú heag.)
Stephans, R. A., & Stephenson, J. (2004). System safety for the 21st century (Updated and rev. ed. of System safety 2000.). Wiley-Interscience.
Lua i Stíl Chicago (17ú heag.)
Stephans, Richard A., agus Joe Stephenson. System Safety for the 21st Century. Updated and rev. ed. of System safety 2000. Hoboken, N.J.: Wiley-Interscience, 2004.
Lua MLA (9ú heag.)
Stephans, Richard A., agus Joe Stephenson. System Safety for the 21st Century. Updated and rev. ed. of System safety 2000. Wiley-Interscience, 2004.
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