Richards, M. C. (1964). Centering in pottery, poetry, and the person. Wesleyan University.
Lua i Stíl Chicago (17ú heag.)Richards, Mary C. Centering in Pottery, Poetry, and the Person. Middletown: Wesleyan University, 1964.
Lua MLA (9ú heag.)Richards, Mary C. Centering in Pottery, Poetry, and the Person. Wesleyan University, 1964.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.