Cita APA (7th ed.)

Benton, M. J., Cook, E., & Turner, P. (2002). Permian and Triassic red beds and the Penarth Group of Great Britain. Joint Nature Conservation Committee.

Cita Chicago (17th ed.)

Benton, M. J., E. Cook, i P. Turner. Permian and Triassic Red Beds and the Penarth Group of Great Britain. Peterborough: Joint Nature Conservation Committee, 2002.

Cita MLA (8th ed.)

Benton, M. J., et al. Permian and Triassic Red Beds and the Penarth Group of Great Britain. Joint Nature Conservation Committee, 2002.