Gaya APA

Chopra, S. (2019). Supply chain management strategy, planning, and operation 7th ed (7th ed). Harlow, UK: Pearson Education, c.

Gaya MLA

Chopra, Sunil. "Supply chain management strategy, planning, and operation 7th ed". 7th ed Harlow, UK: Pearson Education, c, 2019. Buku Wajib.