APA (7th ed.) Citation

Banks, I., & Hardy, D. A. (2010). The spheres and The secret courtyard. The Birmingham Science Fiction Group.

Chicago Style (17th ed.) Citation

Banks, Iain, and David A. Hardy. The Spheres and The Secret Courtyard. Nottingham, U. K.: The Birmingham Science Fiction Group, 2010.

MLA (9th ed.) Citation

Banks, Iain, and David A. Hardy. The Spheres and The Secret Courtyard. The Birmingham Science Fiction Group, 2010.