Παραπομπή APA

Turnbull, P. W., & Cunningham, M. T. (1981). International Markeiting and Purchasing.

Παραπομπή Chicago Style

Turnbull, Peter W., και Malcolm T. Cunningham. International Markeiting and Purchasing. :, 1981.

Παραπομπή MLA

Turnbull, Peter W., και Malcolm T. Cunningham. International Markeiting and Purchasing. 1981.