Παραπομπή σε μορφή APA (7η εκδ.)

Liungman, C. G. (1995). Thought signs: The semiotics of symbols - western non-pictorial ideograms. IOS Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Liungman, Carl G. Thought Signs: The Semiotics of Symbols - Western Non-pictorial Ideograms. Amsterdam: IOS Press, 1995.

Παραπομπή σε μορφή MLA (9th εκδ.)

Liungman, Carl G. Thought Signs: The Semiotics of Symbols - Western Non-pictorial Ideograms. IOS Press, 1995.