Gaya APA

Branney, M, J. (2002). Geological Society Memoir No. 27 : Pyroclastic Density Currents and The Sedimentation of Ignimbrites . London: The Geological Society.

Gaya MLA

Branney, Michael, J.. "Geological Society Memoir No. 27 : Pyroclastic Density Currents and The Sedimentation of Ignimbrites". London: The Geological Society, 2002. Text.