Groeg, O. J. (1979). Who's who in technology. Who's who Book u. Publ. Ges..
Chicagoスタイル(17版)引用形式Groeg, Otto J. Who's Who in Technology. Wörthsee b. München: Who's who Book u. Publ. Ges., 1979.
MLA(8版)引用形式Groeg, Otto J. Who's Who in Technology. Who's who Book u. Publ. Ges., 1979.
警告: この引用は必ずしも正確ではありません.