Reusability Issues and Ada

@article{Gargaro1987ReusabilityIA,
  title={Reusability Issues and Ada},
  author={Anthony Gargaro and F. L. Pappas},
  journal={IEEE Software},
  year={1987},
  volume={4},
  pages={43-51}
}
How do you write reusable code when your methodology doesn't address reusability? These guidelines bility? These guidelines developed by a major defense contractor may help.