Παραπομπή APA

Beardshaw, J. (1992). Economics: A students guide (3.). ELBS.

Παραπομπή Chicago Style

Beardshaw, John. Economics: A Students Guide. 3. London: ELBS, 1992.

Παραπομπή MLA

Beardshaw, John. Economics: A Students Guide. 3. ELBS, 1992.