APA-ийн эшлэл(7 дахь хэвлэлт)

ebrary, Inc, & 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)

ebrary, Inc, ба John Kent Folmar. "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)

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