Burton, J., & Diederichsen, D. (2015). Helen Marten: Parrot Problems / With contr. by Johanna Burton, Diedrich Diederichsen, Helen Marten and Susanne Pfeffer. Fridericianum ed. by Susanne Pfeffer. Koenig Books [u.a.].

Burton, Johanna, and Diedrich Diederichsen. Helen Marten: Parrot Problems / With Contr. by Johanna Burton, Diedrich Diederichsen, Helen Marten and Susanne Pfeffer. Fridericianum Ed. by Susanne Pfeffer. London: Koenig Books [u.a.], 2015.

Burton, Johanna, and Diedrich Diederichsen. Helen Marten: Parrot Problems / With Contr. by Johanna Burton, Diedrich Diederichsen, Helen Marten and Susanne Pfeffer. Fridericianum Ed. by Susanne Pfeffer. Koenig Books [u.a.], 2015.