Gaya APA

Yiannis, P, V., Frederick, D, S. (1977). Macreconomics Model and Policy . Canada: John Willey and Sons, Inc.

Gaya MLA

Yiannis, P., Venoeris,., Frederick, D., Sebold,. "Macreconomics Model and Policy". Canada: John Willey and Sons, Inc, 1977. Text.