Cita APA (7th ed.)

Langford, D. (2006). The end of Harry Potter? Gollancz.

Cita Chicago (17th ed.)

Langford, David. The End of Harry Potter? London: Gollancz, 2006.

Cita MLA (9th ed.)

Langford, David. The End of Harry Potter? Gollancz, 2006.