Cita APA (7a ed.)

Walsh, B. (2018). Cambridge IGCSE and O Level history: Option B: The 20th century ([Coursebook], second edition.). Hodder Education, an Hachette UK Company.

Cita Chicago Style (17a ed.)

Walsh, Ben. Cambridge IGCSE and O Level History: Option B: The 20th Century. [Coursebook], second edition. London: Hodder Education, an Hachette UK Company, 2018.

Cita MLA (9a ed.)

Walsh, Ben. Cambridge IGCSE and O Level History: Option B: The 20th Century. [Coursebook], second edition. Hodder Education, an Hachette UK Company, 2018.