George E. Mueller, Associate Administrator of the Office of Manned Spaceflight, issued a directive on April 24, 1967, that the mission would be officially recorded as Apollo 1, "first manned Apollo Saturn flight - failed on ground test."
Ertel, Ivan D.; Newkirk, Roland W.; Brooks, Courtney G. (1978). "Vol.11, part 1 (1967 Mar/Apr), March 25 - April 24". NASA SP-4009: The Apollo Spacecraft – A Chronology. NASA. Retrieved March 3, 2011.
Jones, Eric M.; Glover, Ken, eds. (1995). "First Steps". Apollo 11 Lunar Surface Journal. NASA. Retrieved September 23, 2006.
Jones, Eric M., ed. (1995). "One Small Step". Apollo 11 Lunar Surface Journal. NASA. Retrieved June 13, 2013.
Jones, Eric M. (July 28, 2011). "AS11-40-5886". Apollo 11 Lunar Surface Journal. NASA. Archived from the original on July 28, 2011. Retrieved May 13, 2011.
Jones, Eric M. (July 28, 2011). "AS11-40-5886". Apollo 11 Lunar Surface Journal. NASA. Archived from the original on July 28, 2011. Retrieved May 13, 2011.
Chaikin 2007, pp. 437, 442, 557–558. Chaikin, Andrew (2007) [1994]. A Man on the Moon: The Voyages of the Apollo Astronauts. London: Penguin Books. ISBN978-0-14-311235-8. OCLC958200469.