Cita APA (7a ed.)
Schobert, H. H. (1987). Coal, the energy source of the past and future. American Chemical Society.
Cita Chicago Style (17a ed.)
Schobert, Harold H. Coal, the Energy Source of the Past and Future. Washington, DC: American Chemical Society, 1987.
Cita MLA (9a ed.)
Schobert, Harold H. Coal, the Energy Source of the Past and Future. American Chemical Society, 1987.
Precaución: Estas citas no son 100% exactas.