Cita APA (7th ed.)

(1989). Validating the Concrete to Abstract Instructional Sequence for Teaching Place Value to Learning Disabled Students. Monograph #20 Susan K. Peterson and Others. [microform].

Cita Chicago (17th ed.)

Validating the Concrete to Abstract Instructional Sequence for Teaching Place Value to Learning Disabled Students. Monograph #20 Susan K. Peterson and Others. [microform]. 1989.

Cita MLA (9th ed.)

Validating the Concrete to Abstract Instructional Sequence for Teaching Place Value to Learning Disabled Students. Monograph #20 Susan K. Peterson and Others. [microform]. 1989.