Cita APA (7a ed.)

Tunnadine, D., & Green, R. (1978). Unwanted pregnancy - accident or illness? Oxford Univ. Press.

Cita Chicago Style (17a ed.)

Tunnadine, David, y Roger Green. Unwanted Pregnancy - Accident or Illness? Oxford [u.a.]: Oxford Univ. Press, 1978.

Cita MLA (8a ed.)

Tunnadine, David, y Roger Green. Unwanted Pregnancy - Accident or Illness? Oxford Univ. Press, 1978.