Cita APA (7a ed.)

Sobolewski, P., & MacDonald, J. (1989). Discovering the past. Gill and Macmillan.

Cita Chicago Style (17a ed.)

Sobolewski, Peter, y John MacDonald. Discovering the Past. Dublin: Gill and Macmillan, 1989.

Cita MLA (9a ed.)

Sobolewski, Peter, y John MacDonald. Discovering the Past. Gill and Macmillan, 1989.