APA-ийн эшлэл(7 дахь хэвлэлт)

Folmar, J. K. (1986). This State of wonders: The letters of an Iowa frontier family, 1858-1861. University of Iowa Press.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Folmar, John Kent. This State of Wonders: The Letters of an Iowa Frontier Family, 1858-1861. Iowa City: University of Iowa Press, 1986.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Folmar, John Kent. This State of Wonders: The Letters of an Iowa Frontier Family, 1858-1861. University of Iowa Press, 1986.