Cita APA (7a ed.)

Hopkins, D. (1961). Physical chemistry and metal extraction (1a ed.). [s.n.].

Cita Chicago Style (17a ed.)

Hopkins, D.W. Physical Chemistry and Metal Extraction. 1a ed. Londres: [s.n.], 1961.

Cita MLA (9a ed.)

Hopkins, D.W. Physical Chemistry and Metal Extraction. 1a ed. [s.n.], 1961.