Richard V Fisher, H. S. (1984). Pyroclastic rock. Springer-Verlag.
Lua i Stíl Chicago (17ú heag.)Richard V Fisher, Hans-Ulrich Schmincke. Pyroclastic Rock. Springer-Verlag, 1984.
Lua MLA (8ú heag.)Richard V Fisher, Hans-Ulrich Schmincke. Pyroclastic Rock. Springer-Verlag, 1984.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.