Cita APA (7a ed.)

Watson, P. (1981). Twins: An investigation into the strange coincidences in the lives of separated twins. Hutchinson.

Cita Chicago Style (17a ed.)

Watson, Peter. Twins: An Investigation into the Strange Coincidences in the Lives of Separated Twins. London: Hutchinson, 1981.

Cita MLA (9a ed.)

Watson, Peter. Twins: An Investigation into the Strange Coincidences in the Lives of Separated Twins. Hutchinson, 1981.