Dumoulin, Jim (June 29, 2001). "STS-40". Kennedy Space Center Science, Technology and Engineering. NASA/KSC Information Technology Directorate. Archived from the original on January 29, 2022. Retrieved June 2, 2024. This article incorporates text from this source, which is in the public domain.
history.nasa.gov
Fries, Colin (March 13, 2015). "Chronology of Wakeup Calls"(PDF). NASA History Division. Archived from the original(PDF) on December 20, 2023. Retrieved January 22, 2024.
spacefacts.de
"STS-40". Spacefacts. Retrieved February 26, 2014.
Dumoulin, Jim (June 29, 2001). "STS-40". Kennedy Space Center Science, Technology and Engineering. NASA/KSC Information Technology Directorate. Archived from the original on January 29, 2022. Retrieved June 2, 2024. This article incorporates text from this source, which is in the public domain.
Fries, Colin (March 13, 2015). "Chronology of Wakeup Calls"(PDF). NASA History Division. Archived from the original(PDF) on December 20, 2023. Retrieved January 22, 2024.