Cita APA (7a ed.)

Quincey, T. d. (1995). The pleasures and pains of opium. Penguin Books.

Cita Chicago Style (17a ed.)

Quincey, Thomas de. The Pleasures and Pains of Opium. London: Penguin Books, 1995.

Cita MLA (9a ed.)

Quincey, Thomas de. The Pleasures and Pains of Opium. Penguin Books, 1995.