APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (8. p.)

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