Cita APA (7a ed.)

Scull, C., & Hammond, W. G. (2006). The J.R.R. Tolkien companion & guide. HarperCollins.

Cita Chicago Style (17a ed.)

Scull, Christina, y Wayne G. Hammond. The J.R.R. Tolkien Companion & Guide. London: HarperCollins, 2006.

Cita MLA (9a ed.)

Scull, Christina, y Wayne G. Hammond. The J.R.R. Tolkien Companion & Guide. HarperCollins, 2006.