Gaya APA

The Stoic Challenge A Philosopher's Guide to Becoming Tougher, Calmer, and More Resilient. (2026). Jakarta: Gramedia pustaka Utama.

Gaya MLA

The Stoic Challenge A Philosopher's Guide to Becoming Tougher, Calmer, and More Resilient. Ed.I. Jakarta: Gramedia pustaka Utama, 2026. Text.