Billigmeier, R. H., Picard, F. A., Erni, H., Schweizer, J., & Rütlinger, J. J. (1965). The Old land and the new: The journals of two Swiss families in America in the 1820's. Minneapolis: University of Minnesota Press.

Billigmeier, Robert Henry,, Fred Altschuler Picard, Hans Erni, Johannes Schweizer, and Johann Jakob Rütlinger. The Old Land and the New: The Journals of Two Swiss Families in America in the 1820's. Minneapolis: University of Minnesota Press, 1965.

Billigmeier, Robert Henry,, et al. The Old Land and the New: The Journals of Two Swiss Families in America in the 1820's. Minneapolis: University of Minnesota Press, 1965.