Cita APA (7a ed.)

Sobolewski, P., & MacDonald, J. (1985). Let's look at the 19th century. Gill and Macmillan.

Cita Chicago Style (17a ed.)

Sobolewski, Peter, y John MacDonald. Let's Look at the 19th Century. Dublin: Gill and Macmillan, 1985.

Cita MLA (9a ed.)

Sobolewski, Peter, y John MacDonald. Let's Look at the 19th Century. Gill and Macmillan, 1985.