Cita APA (7a ed.)

Woolsey, L. H., Richards, R. W., Lupton, C. T., & Lloyd, E. R. (1917). The Bull Mountain coal field: Musselshell and Yellowstone counties Montana. Government Printing Office.

Cita Chicago Style (17a ed.)

Woolsey, L. H., R. W. Richards, Charles Thomas Lupton, y E. Russell Lloyd. The Bull Mountain Coal Field: Musselshell and Yellowstone Counties Montana. Washington: Government Printing Office, 1917.

Cita MLA (9a ed.)

Woolsey, L. H., et al. The Bull Mountain Coal Field: Musselshell and Yellowstone Counties Montana. Government Printing Office, 1917.