Παραπομπή σε μορφή APA (7η εκδ.)

Ball, V. E., & Norton, G. W. (2002). Agricultural productivity: Measurement and sources of growth. Kluwer Academic Publishers.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Ball, V. Elton, και George W. Norton. Agricultural Productivity: Measurement and Sources of Growth. Boston: Kluwer Academic Publishers, 2002.

Παραπομπή σε μορφή MLA (8th εκδ.)

Ball, V. Elton, και George W. Norton. Agricultural Productivity: Measurement and Sources of Growth. Kluwer Academic Publishers, 2002.