APA (7th ed.) Citation

Hubbard, E., & Morris, W. (1907). This then is a William Morris book. The Roycrofters.

Chicago Style (17th ed.) Citation

Hubbard, Elbert, and William Morris. This Then Is a William Morris Book. East Aurora, N.Y.: The Roycrofters, 1907.

MLA (8th ed.) Citation

Hubbard, Elbert, and William Morris. This Then Is a William Morris Book. The Roycrofters, 1907.