APA (7th ed.) Citation
Gregory, E. (1957). Metallurgy. [s.n.].
Chicago Style (17th ed.) Citation
Gregory, Edwin. Metallurgy. [s.l.]: [s.n.], 1957.
MLA (9th ed.) Citation
Gregory, Edwin. Metallurgy. [s.n.], 1957.
Warning: These citations may not always be 100% accurate.