Cita APA (7a ed.)

Morche, W., Hubberten, H., Ehrmann, W., & Keller, J. (1991). Geochemical investigations of volcanic ash layers from ODP Leg 119. PANGAEA.

Cita Chicago Style (17a ed.)

Morche, Wolfgang, Hans-Wolfgang Hubberten, Werner Ehrmann, y Jörg Keller. Geochemical Investigations of Volcanic Ash Layers from ODP Leg 119. PANGAEA, 1991.

Cita MLA (9a ed.)

Morche, Wolfgang, et al. Geochemical Investigations of Volcanic Ash Layers from ODP Leg 119. PANGAEA, 1991.