APA-viite (7. p.)

Groeg, O. J. (1979). Who's who in technology. Who's who Book u. Publ. Ges..

Chicago-viite (17. p.)

Groeg, Otto J. Who's Who in Technology. Wörthsee b. München: Who's who Book u. Publ. Ges., 1979.

MLA-viite (8. p.)

Groeg, Otto J. Who's Who in Technology. Who's who Book u. Publ. Ges., 1979.