APA (7th ed.) Citation

Peräkylä, A., & Ruusuvuori, J. (2009). Facial Expression in an Assessment. Video analysis: methodology and methods, 127-142.

Chicago Style (17th ed.) Citation

Peräkylä, Anssi, and Johanna Ruusuvuori. "Facial Expression in an Assessment." Video Analysis: Methodology and Methods 2009: 127-142.

MLA (9th ed.) Citation

Peräkylä, Anssi, and Johanna Ruusuvuori. "Facial Expression in an Assessment." Video Analysis: Methodology and Methods, 2009, pp. 127-142.

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