Cita APA (7a ed.)

Gould, P., & Olsson, G. (1982). A search for common ground. Pion.

Cita Chicago Style (17a ed.)

Gould, Peter, y Gunnar Olsson. A Search for Common Ground. London: Pion, 1982.

Cita MLA (9a ed.)

Gould, Peter, y Gunnar Olsson. A Search for Common Ground. Pion, 1982.