Intermediate Technology Development Group, Gater, A., Meller, T., & Warsany, J. (1968). Tools for progress: Guide to equipment and materials for small-scale development available in the United Kingdom. Intermediate Technology Development Group.
Lua i Stíl Chicago (17ú heag.)Intermediate Technology Development Group, Anthony Gater, Tim Meller, agus John Warsany. Tools for Progress: Guide to Equipment and Materials for Small-scale Development Available in the United Kingdom. London: Intermediate Technology Development Group, 1968.
Lua MLA (8ú heag.)Intermediate Technology Development Group, et al. Tools for Progress: Guide to Equipment and Materials for Small-scale Development Available in the United Kingdom. Intermediate Technology Development Group, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.