APA (7th ed.) Citation

Grimm, J., Grimm, W., Ross, V., & Perry, P. (1940). The knapsack, the hat, and the horn. P. Perry.

Chicago Style (17th ed.) Citation

Grimm, Jacob, Wilhelm Grimm, Victor Ross, and Powell Perry. The Knapsack, the Hat, and the Horn. London: P. Perry, 1940.

MLA (9th ed.) Citation

Grimm, Jacob, et al. The Knapsack, the Hat, and the Horn. P. Perry, 1940.