Kral, T. (1989). Portraits in words. English language programs division bureau of educational and cultural affairs.
Chicago-viite (17. p.)Kral, Thomas. Portraits in Words. Washington, Estados Unidos: English language programs division bureau of educational and cultural affairs, 1989.
MLA-viite (9. p.)Kral, Thomas. Portraits in Words. English language programs division bureau of educational and cultural affairs, 1989.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.