APA

KIEFFER R., JANGG G. & ELFMAYER P. (1971). Sondermetalle. New York: .

Chicago

KIEFFER R, JANGG G and ELFMAYER P. 1971. Sondermetalle. New York: .

Harvard

KIEFFER R., JANGG G. and ELFMAYER P. (1971). Sondermetalle. New York: .

MLA

KIEFFER R, JANGG G and ELFMAYER P. Sondermetalle. New York: . 1971.