APA-referens (7:e uppl.)

Betts, E. A., & O'Donnell, M. (1938). Guidebook for teachers on initial stages of reading readiness. Row, Peterson & Company.

Chicago-referens (17:e uppl.)

Betts, Emmett A., och Mabel O'Donnell. Guidebook for Teachers on Initial Stages of Reading Readiness. Evanston, Illinois ; New York City ; San Francisco: Row, Peterson & Company, 1938.

MLA-referens (8:e uppl.)

Betts, Emmett A., och Mabel O'Donnell. Guidebook for Teachers on Initial Stages of Reading Readiness. Row, Peterson & Company, 1938.