Cita APA (7a ed.)

Baker, C. M. A., & Marshall, L. (1986). Ship or Sheep?: An Intermediate Pronunciation Course (2nd ed.). Cambridge University.

Cita Chicago Style (17a ed.)

Baker, C. M. Ann, y Leslie Marshall. Ship or Sheep?: An Intermediate Pronunciation Course. 2nd ed. Cambridge: Cambridge University, 1986.

Cita MLA (8a ed.)

Baker, C. M. Ann, y Leslie Marshall. Ship or Sheep?: An Intermediate Pronunciation Course. 2nd ed. Cambridge University, 1986.