Παραπομπή APA

Harbury, C. D. (1968). Workbook in introductory economics. Pergamon Press.

Παραπομπή Chicago Style

Harbury, C. D. Workbook in Introductory Economics. Oxford: Pergamon Press, 1968.

Παραπομπή MLA

Harbury, C. D. Workbook in Introductory Economics. Pergamon Press, 1968.