Style de citation APA (7e éd.)

Helfferich, T. (2009). The Thirty Years War: A documentary history. Hackett.

Style de citation Chicago (17e éd.)

Helfferich, Tryntje. The Thirty Years War: A Documentary History. Indianapolis [u.a.]: Hackett, 2009.

Style de citation MLA (8e éd.)

Helfferich, Tryntje. The Thirty Years War: A Documentary History. Hackett, 2009.