Cita APA (7a ed.)

O'Brien, P. K. (1988). The economic effects of the American Civil War. MacMillan Education.

Cita Chicago Style (17a ed.)

O'Brien, Patrick Karl. The Economic Effects of the American Civil War. Basingstoke [etc.]: MacMillan Education, 1988.

Cita MLA (9a ed.)

O'Brien, Patrick Karl. The Economic Effects of the American Civil War. MacMillan Education, 1988.