Gaya APA

Hong, T., Koe, T. (2025). New Frontiers 5 : Student book B1+ Upper Intermediate (Sixth Reprinted). Indonesia: PT. Asta.

Gaya MLA

Hong, Thomas., Koe, Tapanga. "New Frontiers 5 : Student book B1+ Upper Intermediate". Sixth Reprinted Indonesia: PT. Asta, 2025. Text.