APA (7th ed.) Citation

Simms, V. R. (2010). A developmental study of the problem-size and the effects in single-digit addition.

Chicago Style (17th ed.) Citation

Simms, V. R. A Developmental Study of the Problem-size and the Effects in Single-digit Addition. 2010.

MLA (9th ed.) Citation

Simms, V. R. A Developmental Study of the Problem-size and the Effects in Single-digit Addition. 2010.

Warning: These citations may not always be 100% accurate.