Zurbrugg, N. Quantitative or Qualitative? Toward a Definition of Interdisciplinary Problems: Nicholas Zurbrugg. Literature and the other arts.(1981).
Παραπομπή σε μορφή Chicago (17η εκδ.)Zurbrugg, Nicholas. "Quantitative or Qualitative? Toward a Definition of Interdisciplinary Problems: Nicholas Zurbrugg." Literature and the Other Arts.(1981) .
Παραπομπή σε μορφή MLA (8th εκδ.)Zurbrugg, Nicholas. "Quantitative or Qualitative? Toward a Definition of Interdisciplinary Problems: Nicholas Zurbrugg." Literature and the Other Arts.(1981), .
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