Schaeffer, E. (1972). Hidden art. Tyndale house.
Lua i Stíl Chicago (17ú heag.)Schaeffer, Edith. Hidden Art. Wheaton: Tyndale house, 1972.
Lua MLA (9ú heag.)Schaeffer, Edith. Hidden Art. Tyndale house, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.