Hartman, b. R. J. Colloid chemistry. Houghton Mifflin.
Lua i Stíl Chicago (17ú heag.)Hartman, by Robert J. Colloid Chemistry. Houghton Mifflin.
Lua MLA (8ú heag.)Hartman, by Robert J. Colloid Chemistry. Houghton Mifflin.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.