LEAVITT, J. S. (1994). Total Quality Trough Project Management Jeffrey S. Levitt, C [et.al.]. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)LEAVITT, Jeffrey S. Total Quality Trough Project Management Jeffrey S. Levitt, C [et.al.]. McGraw-Hill, 1994.
Lua MLA (8ú heag.)LEAVITT, Jeffrey S. Total Quality Trough Project Management Jeffrey S. Levitt, C [et.al.]. McGraw-Hill, 1994.
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