Courage! Brieven

MLA

Gerhardt, Ida G. M, Ben Hosman, and Mieke Koenen. Courage! Brieven. Amsterdam: Athenaeum, 2005.

APA

Gerhardt, I. G. M, Hosman, B., & Koenen, M. (2005). Courage! Brieven. Amsterdam: Athenaeum.

Chicago

Gerhardt, Ida G. M Courage! Brieven. Edited by Ben Hosman and Mieke Koenen. Amsterdam: Athenaeum, 2005.