Francis, M., & Knight, C. (1987). Cumulus. Parkett.
Lua i Stíl Chicago (17ú heag.)Francis, Mark, agus Christopher Knight. "Cumulus." Parkett 1987.
Lua MLA (8ú heag.)Francis, Mark, agus Christopher Knight. "Cumulus." Parkett, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.