Your paper must contain at least one accurately documented (APA style) parenthetical citation for each source listed on your reference page.

Links for resources

https://www.rand.org/content/dam/rand/pubs/monograph_reports/2005/MR1641.pdf

https://pdfs.semanticscholar.org/6b95/94640c13a3932f781c0244775fcbe440abb2.pdf

https://www.hindawi.com/journals/aor/2016/2576825/

https://www.researchgate.net/publication/268685208_Optimization_of_Aircraft_Utilization_by_Reducing_Scheduled_Maintenance_Downtime

https://www.cbo.gov/sites/default/files/107th-congress-2001-2002/reports/agingcostsom.pdf

https://www.cna.org/CNA_files/PDF/D0000289.A2.pdf

https://www.research.manchester.ac.uk/portal/files/54582588/FULL_TEXT.PDF

https://www.iata.org/contentassets/bf8ca67c8bcd4358b3d004b0d6d0916f/mcaa-1sted-2018.pdf

https://www.cbo.gov/system/files/2018-09/54113-aging_aircraft.pdf

http://www.boeing.com/assets/pdf/commercial/aircraft_economic_life_whitepaper.pdf