Παραπομπή APA

Barker, S. F. (1974). Elements of logic (2nd ed.). McGraw-Hill.

Παραπομπή Chicago Style

Barker, Stephen Francis. Elements of Logic. 2nd ed. New York: McGraw-Hill, 1974.

Παραπομπή MLA

Barker, Stephen Francis. Elements of Logic. 2nd ed. McGraw-Hill, 1974.