APA
HAFNER J.Rebbaca, . (2018). The Goldilocks placebo effects: Placebo effects are stronger when people select a treatment from an optimal number of choices. Champaign: The University of Illinois.
Chicago
HAFNER J.Rebbaca, . 2018. The Goldilocks placebo effects: Placebo effects are stronger when people select a treatment from an optimal number of choices. Champaign: The University of Illinois.
Harvard
HAFNER J.Rebbaca, . (2018). The Goldilocks placebo effects: Placebo effects are stronger when people select a treatment from an optimal number of choices. Champaign: The University of Illinois.
MLA
HAFNER J.Rebbaca, . The Goldilocks placebo effects: Placebo effects are stronger when people select a treatment from an optimal number of choices. Champaign: The University of Illinois. 2018.