Παραπομπή APA

Oster, S. M. (1994). Modern competitive analysis (2nd ed.). University press.

Παραπομπή Chicago Style

Oster, Sharon M. Modern Competitive Analysis. 2nd ed. New York: University press, 1994.

Παραπομπή MLA

Oster, Sharon M. Modern Competitive Analysis. 2nd ed. University press, 1994.