Não informado. (1969). Minerals science and engineering. National Institute for Metallurgy.
Cita Chicago Style (17a ed.)Não informado. Minerals Science and Engineering. Cottesloe, Africa do Sul: National Institute for Metallurgy, 1969.
Cita MLA (8a ed.)Não informado. Minerals Science and Engineering. National Institute for Metallurgy, 1969.
Precaución: Estas citas no son 100% exactas.