Παραπομπή σε μορφή APA (7η εκδ.)

Kral, T. (1989). Portraits in words. English language programs division bureau of educational and cultural affairs.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Kral, Thomas. Portraits in Words. Washington, Estados Unidos: English language programs division bureau of educational and cultural affairs, 1989.

Παραπομπή σε μορφή MLA (9th εκδ.)

Kral, Thomas. Portraits in Words. English language programs division bureau of educational and cultural affairs, 1989.