Παραπομπή σε μορφή APA (7η εκδ.)

Wetter, J. J. (2011). The Impacts of Research and Development Expenditures: The Relationship Between Total Factor Productivity and U.S. Gross Domestic Product Performance. Springer New York.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Wetter, John J. The Impacts of Research and Development Expenditures: The Relationship Between Total Factor Productivity and U.S. Gross Domestic Product Performance. New York, NY: Springer New York, 2011.

Παραπομπή σε μορφή MLA (8th εκδ.)

Wetter, John J. The Impacts of Research and Development Expenditures: The Relationship Between Total Factor Productivity and U.S. Gross Domestic Product Performance. Springer New York, 2011.