PORTER MICHAEL E. (1998). ON COMPETITION. HARVERD BUSINESS SCHOOL.
Citazione stile Chigago Style (17a edizione)PORTER MICHAEL E. ON COMPETITION. BOSTON: HARVERD BUSINESS SCHOOL, 1998.
Citatione MLA (9a ed.)PORTER MICHAEL E. ON COMPETITION. HARVERD BUSINESS SCHOOL, 1998.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.