APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (8e ed.) Bronvermelding

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