APA (7th ed.) Citation

Leffingwell, R. (2009). Adding and counting on. Pearson Malaysia S.B.

Chicago Style (17th ed.) Citation

Leffingwell, Richard. Adding and Counting on. Selangor: Pearson Malaysia S.B, 2009.

MLA (9th ed.) Citation

Leffingwell, Richard. Adding and Counting on. Pearson Malaysia S.B, 2009.

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