Παραπομπή APA

Hengartner, W., & Theodoreseu, R. (1973). Concentration functions. Academic.

Παραπομπή Chicago Style

Hengartner, W., και R. Theodoreseu. Concentration Functions. New York: Academic, 1973.

Παραπομπή MLA

Hengartner, W., και R. Theodoreseu. Concentration Functions. Academic, 1973.