Cita APA (7a ed.)

Cooper, O. H., & Estill, H. F. (2015). History of our country: A text-book for shools.

Cita Chicago Style (17a ed.)

Cooper, Oscar Henry, y Harry Fishburne Estill. History of Our Country: A Text-book for Shools. 2015.

Cita MLA (9a ed.)

Cooper, Oscar Henry, y Harry Fishburne Estill. History of Our Country: A Text-book for Shools. 2015.