APA (7th ed.) Citation

Umphress, D. A., Friesen, D. K., & Shannon, R. E. (1987). Model execution in a goal-oriented discrete event simulation environment.

Chicago Style (17th ed.) Citation

Umphress, David Ashley, Donald K. Friesen, and Robert E. Shannon. Model Execution in a Goal-oriented Discrete Event Simulation Environment. 1987.

MLA (9th ed.) Citation

Umphress, David Ashley, et al. Model Execution in a Goal-oriented Discrete Event Simulation Environment. 1987.