APA (7th ed.) Citation

Shakespeare, W., Mack, M., & Boynton, R. W. (1990). The tragedy of Macbeth. Boynton/Cook Publishers.

Chicago Style (17th ed.) Citation

Shakespeare, William, Maynard Mack, and Robert W. Boynton. The Tragedy of Macbeth. Portsmouth, NH: Boynton/Cook Publishers, 1990.

MLA (9th ed.) Citation

Shakespeare, William, et al. The Tragedy of Macbeth. Boynton/Cook Publishers, 1990.