Gaya APA

tracy, B. (2023). Unstoppable: motivation secrets you need to develop courage, confidence, and a positive mental attitude (Cet.1). Canada: Gildan media LLC.

Gaya MLA

tracy, Brian. "Unstoppable: motivation secrets you need to develop courage, confidence, and a positive mental attitude". Cet.1 Canada: Gildan media LLC, 2023. Equipment.