APA-ийн эшлэл(7 дахь хэвлэлт)
ebrary, Inc, & Zempel, S. (1991). In their own words: Letters from Norwegian immigrants. University of Minnesota Press in cooperation with the Norwegian-American Historical Association.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)
ebrary, Inc, ба Solveig Zempel. In Their Own Words: Letters from Norwegian Immigrants. Minneapolis: University of Minnesota Press in cooperation with the Norwegian-American Historical Association, 1991.
MLA -ийн эшлэл (9 дэх хэвлэлт)
ebrary, Inc, ба Solveig Zempel. In Their Own Words: Letters from Norwegian Immigrants. University of Minnesota Press in cooperation with the Norwegian-American Historical Association, 1991.
Анхааруулга: Эдгээр ишлэлүүд үргэлж 100% үнэн зөв биш байж магадгүй.