Gaya APA

Schwarzkopf, P., Kieffer, R. (1953). Refractory Hard Metals : Borides, Carbides, Nitrides, Silicides . New York: The Macmillan Company.

Gaya MLA

Schwarzkopf, Paul., Kieffer, Richard. "Refractory Hard Metals : Borides, Carbides, Nitrides, Silicides". New York: The Macmillan Company, 1953. Text.