Dyfyniad APA

PORTER MICHAEL E. (1998). ON COMPETITION. HARVERD BUSINESS SCHOOL.

Dyfyniad Arddull Chicago

PORTER MICHAEL E. ON COMPETITION. BOSTON: HARVERD BUSINESS SCHOOL, 1998.

Dyfyniad MLA

PORTER MICHAEL E. ON COMPETITION. HARVERD BUSINESS SCHOOL, 1998.

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