Goldstein, H., & Levitt, E. (1968). A reading readiness workbook in spatial discrimination. Parkinson Division, Follett Educational Corp.
Chicago-referens (17:e uppl.)Goldstein, Herbert, och Edith Levitt. A Reading Readiness Workbook in Spatial Discrimination. [Urbana, Ill.]: Parkinson Division, Follett Educational Corp, 1968.
MLA-referens (8:e uppl.)Goldstein, Herbert, och Edith Levitt. A Reading Readiness Workbook in Spatial Discrimination. Parkinson Division, Follett Educational Corp, 1968.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.