Ward, M. E., & Maquardt, D. A. (1975). Illustrators of books for young people (2nd ed.). Scarecrow Press.
Lua i Stíl Chicago (17ú heag.)Ward, Martha Eads, agus Dorothy A. Maquardt. Illustrators of Books for Young People. 2nd ed. Metuchen, N. J: Scarecrow Press, 1975.
Lua MLA (9ú heag.)Ward, Martha Eads, agus Dorothy A. Maquardt. Illustrators of Books for Young People. 2nd ed. Scarecrow Press, 1975.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.