Pollack, B., & Stein, G. (1962). The collectors: Dr. Claribel and Miss Etta Cone / by Barbara Pollack. With a portrait by Gertrude Stein. Bobbs-Merrill.
Lua i Stíl Chicago (17ú heag.)Pollack, Barbara, agus Gertrude Stein. The Collectors: Dr. Claribel and Miss Etta Cone / by Barbara Pollack. With a Portrait by Gertrude Stein. Indianapolis, Ind. [u.a.]: Bobbs-Merrill, 1962.
Lua MLA (8ú heag.)Pollack, Barbara, agus Gertrude Stein. The Collectors: Dr. Claribel and Miss Etta Cone / by Barbara Pollack. With a Portrait by Gertrude Stein. Bobbs-Merrill, 1962.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.