Παραπομπή APA

Gylfason, T. (1999). Principles of economic growth. Oxford University.

Παραπομπή Chicago Style

Gylfason, Thorvaldur. Principles of Economic Growth. Oxford: Oxford University, 1999.

Παραπομπή MLA

Gylfason, Thorvaldur. Principles of Economic Growth. Oxford University, 1999.