Cita APA (7a ed.)

Gilbert, D., Summerhayes, C. P., & Johnson, D. L. (1980). Nature, origin, and petroleum source potential of organic matter at DSDP Leg 56-57 Holes. PANGAEA.

Cita Chicago Style (17a ed.)

Gilbert, Deborah, Colin P. Summerhayes, y David L. Johnson. Nature, Origin, and Petroleum Source Potential of Organic Matter at DSDP Leg 56-57 Holes. PANGAEA, 1980.

Cita MLA (9a ed.)

Gilbert, Deborah, et al. Nature, Origin, and Petroleum Source Potential of Organic Matter at DSDP Leg 56-57 Holes. PANGAEA, 1980.