MLA

Grahame, Kenneth, 1859-1932, Milne, A. A. (Alan Alexander), 1882-1956, Rackham, Arthur, 1867-1939. The wind in the willows ... / by Kenneth Grahame ; illustrations by Arthur Rackham ; introduction by A.A. Milne. [c1940]. https://collections.library.yale.edu/catalog/10691069.

APA, 6th edition

Grahame, Kenneth, 1859-1932, & Milne, A. A. (Alan Alexander), 1882-1956, & Rackham, Arthur, 1867-1939. ([c1940])[The wind in the willows ... / by Kenneth Grahame ; illustrations by Arthur Rackham ; introduction by A.A. Milne]. https://collections.library.yale.edu/catalog/10691069.