Spitz, A. A. (1969). Developmental change: An annotated bibliography. University Press of Kentucky.
Lua i Stíl Chicago (17ú heag.)Spitz, Allan A. Developmental Change: An Annotated Bibliography. Lexington: University Press of Kentucky, 1969.
Lua MLA (9ú heag.)Spitz, Allan A. Developmental Change: An Annotated Bibliography. University Press of Kentucky, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.