Lua APA (7ú heag.)
Marxsen, P. M., & Stevens, S. (2015). Helene Schweitzer: A life of her own (First edition.). Syracuse University Press.
Lua i Stíl Chicago (17ú heag.)
Marxsen, Patti M., agus Sylvia Stevens. Helene Schweitzer: A Life of Her Own. First edition. Syracuse, New York: Syracuse University Press, 2015.
Lua MLA (9ú heag.)
Marxsen, Patti M., agus Sylvia Stevens. Helene Schweitzer: A Life of Her Own. First edition. Syracuse University Press, 2015.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.