Cita APA (7a ed.)

Francis, W. (1961). Coal: Its Formation and Composition (2nd. ed.). Edward Arnold.

Cita Chicago Style (17a ed.)

Francis, Wilfrid. Coal: Its Formation and Composition. 2nd. ed. London: Edward Arnold, 1961.

Cita MLA (9a ed.)

Francis, Wilfrid. Coal: Its Formation and Composition. 2nd. ed. Edward Arnold, 1961.