APA (7th ed.) Citation

Chala, G. T., Abd Rashid, A. A., & Hagos, F. Y. (2018). Natural Gas Engine Technologies: Challenges and Energy Sustainability Issue. MDPI AG.

Chicago Style (17th ed.) Citation

Chala, G. T., Abd Aziz Abd Rashid, and F. Y. Hagos. Natural Gas Engine Technologies: Challenges and Energy Sustainability Issue. MDPI AG, 2018.

MLA (8th ed.) Citation

Chala, G. T., et al. Natural Gas Engine Technologies: Challenges and Energy Sustainability Issue. MDPI AG, 2018.