(1981). Graphite: A chapter from Mineral facts and problems, 1980 edition.
Cita Chicago (17th ed.)Graphite: A Chapter from Mineral Facts and Problems, 1980 Edition. 1981.
Cita MLA (9th ed.)Graphite: A Chapter from Mineral Facts and Problems, 1980 Edition. 1981.
Atenció: Aquestes cites poden no estar 100% correctes.