https://fpb.unmas.ac.id/ https://feb.untan.ac.id/ https://semristek.istn.ac.id/ https://heylink.me/jagungbetslot88uangasli/

Gaya APA

Porter, M, E. (1947). On competition . United States of Amerika: HBS press.

Gaya MLA

Porter, Michael, E. "On competition". United States of Amerika: HBS press, 1947. UMUM.