APA

Butts A., . (1943). Metallurgical problems. New York: McGraw-Hill.

Chicago

Butts Allison, . 1943. Metallurgical problems. New York: McGraw-Hill.

Harvard

Butts A., . (1943). Metallurgical problems. New York: McGraw-Hill.

MLA

Butts Allison, . Metallurgical problems. New York: McGraw-Hill. 1943.