Cita APA (7th ed.)

Chapman, P. F., & Roberts, F. (1983). Metal resources and energy. Butteworths.

Cita Chicago (17th ed.)

Chapman, P. F., i F. Roberts. Metal Resources and Energy. Londres: Butteworths, 1983.

Cita MLA (9th ed.)

Chapman, P. F., i F. Roberts. Metal Resources and Energy. Butteworths, 1983.