Cita APA (7a ed.)

Birke, D., Butter, M., & Köppe, T. (2011). Counterfactual thinking, counterfactual writing. De Gruyter.

Cita Chicago Style (17a ed.)

Birke, Dorothee, Michael Butter, y Tilmann Köppe. Counterfactual Thinking, Counterfactual Writing. Berlin ; Boston: De Gruyter, 2011.

Cita MLA (8a ed.)

Birke, Dorothee, et al. Counterfactual Thinking, Counterfactual Writing. De Gruyter, 2011.