Cita APA (7a ed.)

Seagull Bobby. (2019). Life-Changing Magic of Numbers. Penguin Random House, Virgin Book UK.

Cita Chicago Style (17a ed.)

Seagull Bobby. Life-Changing Magic of Numbers. London: Penguin Random House, Virgin Book UK, 2019.

Cita MLA (9a ed.)

Seagull Bobby. Life-Changing Magic of Numbers. Penguin Random House, Virgin Book UK, 2019.