https://www.citadel.edu/distinguished-scholars/wp-content/uploads/sites/108/ninja-forms/5/Do-Delta-airlines-have-senior-discounts.pdf
https://www.citadel.edu/distinguished-scholars/wp-content/uploads/sites/108/ninja-forms/5/How-to-Manage-Delta-Airlines-Booking-from-NYC-Area.pdf
https://www.goodreads.com/quotes/14226346-how-to-manage-delta-airlines-booking-from-nyc-area-many
https://www.goodreads.com/quotes/14227610-booking-how-to-confirm-delta-airlines-new-booking-from-queens