APA (7th ed.) Citation

Engeström, Y. (1987). Learning by expanding: An activity-theoretical approach to developmental research. Orienta-Konsultit Oy.

Chicago Style (17th ed.) Citation

Engeström, Yrjö. Learning by Expanding: An Activity-theoretical Approach to Developmental Research. Helsinki: Orienta-Konsultit Oy, 1987.

MLA (9th ed.) Citation

Engeström, Yrjö. Learning by Expanding: An Activity-theoretical Approach to Developmental Research. Orienta-Konsultit Oy, 1987.

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