PORTER MICHAEL E. (1998). ON COMPETITION. HARVERD BUSINESS SCHOOL.
Chicagoスタイル(17版)引用形式PORTER MICHAEL E. ON COMPETITION. BOSTON: HARVERD BUSINESS SCHOOL, 1998.
MLA(9版)引用形式PORTER MICHAEL E. ON COMPETITION. HARVERD BUSINESS SCHOOL, 1998.
警告: この引用は必ずしも正確ではありません.