GUYTON WILLIAM J. (1980). PROFITABLE MARKETING PRODUCTION TEAM WORK. TARAPOREVALA PUBLICATIONS.
Lua i Stíl Chicago (17ú heag.)GUYTON WILLIAM J. PROFITABLE MARKETING PRODUCTION TEAM WORK. BOMBAY: TARAPOREVALA PUBLICATIONS, 1980.
Lua MLA (9ú heag.)GUYTON WILLIAM J. PROFITABLE MARKETING PRODUCTION TEAM WORK. TARAPOREVALA PUBLICATIONS, 1980.
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