Gw mau tau Nota dari Michael Collins (angkasawan). Jelasin dalam bahasa melayu

Butler, Carol L. (1998). NASA Johnson Space Center Oral History Project Biographical Data Sheet (PDF). Retrieved February 14, 2006.

Statement From Apollo 11 Astronaut Michael Collins, NASA Public Release no. 09-164.  Collins's statement on the 40th anniversary of the Apollo 11 mission, July 9, 2009