Παραπομπή σε μορφή APA (7η εκδ.)

Welch, G. F. (1983). Improvability of poor pitch singing: Experiments in feedback. University of London.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Welch, Graham F. Improvability of Poor Pitch Singing: Experiments in Feedback. University of London, 1983.

Παραπομπή σε μορφή MLA (8th εκδ.)

Welch, Graham F. Improvability of Poor Pitch Singing: Experiments in Feedback. University of London, 1983.