Ritchie, A. D. (1965). Studies in the history and methods of the sciences (Reprinted.). The Edinburgh University Press.
Lua i Stíl Chicago (17ú heag.)Ritchie, Arthur David. Studies in the History and Methods of the Sciences. Reprinted. Edinburgh: The Edinburgh University Press, 1965.
Lua MLA (9ú heag.)Ritchie, Arthur David. Studies in the History and Methods of the Sciences. Reprinted. The Edinburgh University Press, 1965.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.