APA استشهاد

Silverman, H. (1964). The substance of economics: For the student and the general reader/16e (16th ed.). Pitman.

استشهاد بنمط شيكاغو

Silverman, H.A. The Substance of Economics: For the Student and the General Reader/16e. 16th ed. London: Pitman, 1964.

MLA استشهاد

Silverman, H.A. The Substance of Economics: For the Student and the General Reader/16e. 16th ed. Pitman, 1964.