APA (7th ed.) Citation

Milne, A. A., & Shepard, E. H. (1930). The Christopher Robin birthday book. Methuen & Co..

Chicago Style (17th ed.) Citation

Milne, A. A., and Ernest H. Shepard. The Christopher Robin Birthday Book. London: Methuen & Co., 1930.

MLA (9th ed.) Citation

Milne, A. A., and Ernest H. Shepard. The Christopher Robin Birthday Book. Methuen & Co., 1930.

Warning: These citations may not always be 100% accurate.