APA-ийн эшлэл(7 дахь хэвлэлт)

Pritchard, M. H., & Emerson, J. (2011). The dark days of Abraham Lincoln's widow, as revealed by her own letters. Southern Illinois University Press.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Pritchard, Myra Helmer, ба Jason Emerson. The Dark Days of Abraham Lincoln's Widow, as Revealed by Her Own Letters. Carbondale: Southern Illinois University Press, 2011.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Pritchard, Myra Helmer, ба Jason Emerson. The Dark Days of Abraham Lincoln's Widow, as Revealed by Her Own Letters. Southern Illinois University Press, 2011.