Παραπομπή APA

Shipp, D. E., & Adams, S. (1964). Developing arithemetic concepts and skills.

Παραπομπή Chicago Style

Shipp, Donald E., και Sam Adams. Developing Arithemetic Concepts and Skills. Prentice-Hall Inc., Englewood Cliffs, New Jersy, 1964.

Παραπομπή MLA

Shipp, Donald E., και Sam Adams. Developing Arithemetic Concepts and Skills. 1964.