APA (7th ed.) Citation
Helfferich, T. (2013). The iron princess: Amalia Elisabeth and the Thirty Years War. Harvard University Press.
Chicago Style (17th ed.) Citation
Helfferich, Tryntje. The Iron Princess: Amalia Elisabeth and the Thirty Years War. Cambridge ; London: Harvard University Press, 2013.
MLA (9th ed.) Citation
Helfferich, Tryntje. The Iron Princess: Amalia Elisabeth and the Thirty Years War. Harvard University Press, 2013.
Warning: These citations may not always be 100% accurate.