Hofer, C. W., & Schendel, D. (1978). Strategy formulation: Analytical concepts. West Pub. Co.
Lua i Stíl Chicago (17ú heag.)Hofer, Charles W., agus Dan Schendel. Strategy Formulation: Analytical Concepts. St. Paul: West Pub. Co, 1978.
Lua MLA (9ú heag.)Hofer, Charles W., agus Dan Schendel. Strategy Formulation: Analytical Concepts. West Pub. Co, 1978.
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