Παραπομπή APA

Schwab, K., & Porter, M. E. S. (1999). global competitiveness report 1999. Oxford University.

Παραπομπή Chicago Style

Schwab, Klaus, και Michael E. Sachs Porter. Global Competitiveness Report 1999. New Delhi: Oxford University, 1999.

Παραπομπή MLA

Schwab, Klaus, και Michael E. Sachs Porter. Global Competitiveness Report 1999. Oxford University, 1999.