Gems, P., & Lengerke, C. v. (1982). Queen Christina: A play in two acts / by Pam Gems (2. Auflage.). St. Luke's Press.
Lua i Stíl Chicago (17ú heag.)Gems, Pam, agus Christiane von Lengerke. Queen Christina: A Play in Two Acts / by Pam Gems. 2. Auflage. London: St. Luke's Press, 1982.
Lua MLA (8ú heag.)Gems, Pam, agus Christiane von Lengerke. Queen Christina: A Play in Two Acts / by Pam Gems. 2. Auflage. St. Luke's Press, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.