Forer, L. K. (1969). Birth order and life roles. Thomas.
Lua i Stíl Chicago (17ú heag.)Forer, Lucille K. Birth Order and Life Roles. Springfield, IL: Thomas, 1969.
Lua MLA (9ú heag.)Forer, Lucille K. Birth Order and Life Roles. Thomas, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.