APA-čujuhus (7. p.)
Marras, W. S. (2008). The working back: A systems view. Wiley-Interscience.
Chicago-čujuhus (17. p.)
Marras, William S. The Working Back: A Systems View. Hoboken, N.J.: Wiley-Interscience, 2008.
MLA-čujuhus (9. p.)
Marras, William S. The Working Back: A Systems View. Wiley-Interscience, 2008.
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