Cita APA

Duncan, R., & Weston-smith, M. (1977). Encyclopaedia of ignorance: Everything you ever wanted to know about the unknown. Oxford.

Citación estilo Chicago

Duncan, Ronald, y Miranda Weston-smith. Encyclopaedia of Ignorance: Everything You Ever Wanted to Know About the Unknown. Pergamon Press: Oxford, 1977.

Cita MLA

Duncan, Ronald, y Miranda Weston-smith. Encyclopaedia of Ignorance: Everything You Ever Wanted to Know About the Unknown. Oxford, 1977.