Gaya APA

Lestary, D. et al (2026). Beyond the ridge: a philosophy of aviation safety in mountain and valley operations . Purbalingga: Eureka Media Aksara.

Gaya MLA

Lestary, Dwi. et al. "Beyond the ridge: a philosophy of aviation safety in mountain and valley operations". Purbalingga: Eureka Media Aksara, 2026. Text.