APA (7th ed.) Citation

(1985). Learning to add and subtract: Learning activities and implications from recent cognitive research / Gerald Kulm.

Chicago Style (17th ed.) Citation

Learning to Add and Subtract: Learning Activities and Implications from Recent Cognitive Research / Gerald Kulm. 1985.

MLA (9th ed.) Citation

Learning to Add and Subtract: Learning Activities and Implications from Recent Cognitive Research / Gerald Kulm. 1985.