The wrong box,
by Robert Louis Stevenson and Lloyd Osbourne. With an introd. by Bernard Darwin.

APA Citation

Stevenson, R. Louis., Osbourne, L. (1956). The wrong box. London: Oxford University Press.

MLA Citation

Stevenson, Robert Louis, 1850-1894, and Lloyd Osbourne. The Wrong Box. London: Oxford University Press, 1956.

Warning: These citations may not always be complete (especially for serials).