Cita APA (7a ed.)

Brekke, T. L., & Ripley, B. D. (1987). Design guidelines for pressure tunnels and shafts. Electric Power Research Institute.

Cita Chicago Style (17a ed.)

Brekke, T. L., y B. D. Ripley. Design Guidelines for Pressure Tunnels and Shafts. California: Electric Power Research Institute, 1987.

Cita MLA (9a ed.)

Brekke, T. L., y B. D. Ripley. Design Guidelines for Pressure Tunnels and Shafts. Electric Power Research Institute, 1987.