APA (7th ed.) Citation

Irving, W., Pennell, J., & Pennell, E. R. (1896). The Alhambra. Macmillan.

Chicago Style (17th ed.) Citation

Irving, Washington, Joseph Pennell, and Elizabeth Robins Pennell. The Alhambra. London [England] ; New York: Macmillan, 1896.

MLA (9th ed.) Citation

Irving, Washington, et al. The Alhambra. Macmillan, 1896.