Brodie, L. (1984). Thinking forth: A language and philosophy for solving problems. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Brodie, Leo. Thinking Forth: A Language and Philosophy for Solving Problems. Englewood Cliffs, N. J: Prentice-Hall, 1984.
Lua MLA (9ú heag.)Brodie, Leo. Thinking Forth: A Language and Philosophy for Solving Problems. Prentice-Hall, 1984.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.