Citazione Stile APA (7a Edizione)

Bonin, C. (2021). Singing makes you happy: 10-minute workout for a beautiful voice. Self-Published.

Citazione stile Chigago Style (17a edizione)

Bonin, Christin. Singing Makes You Happy: 10-minute Workout for a Beautiful Voice. [Place of publication not identified]: Self-Published, 2021.

Citatione MLA (9a ed.)

Bonin, Christin. Singing Makes You Happy: 10-minute Workout for a Beautiful Voice. Self-Published, 2021.