Citação norma APA

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

Citação norma Chicago

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

Citação norma MLA

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

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.