Pallathadka, Harikumar, and Laxmi Kirana Pallathadka. “A Detailed Study of Space X Vs. Blue Origin Vs. Virgin Galactic and the Future of Space Travel”. Integrated Journal for Research in Arts and Humanities 2, no. 6 (November 30, 2022): 195–201. Accessed September 20, 2024. https://ijrah.stallionpublication.com/index.php/ijrah/article/view/156.