APA (7th ed.) Citation

Egan, S., Piek, J., Dyck, M., & Kane, R. (2011). The reliability and validity of the positive and negative perfectionism scale. Wiley-Blackwell Publishing Ltd.

Chicago Style (17th ed.) Citation

Egan, Sarah, Jan Piek, M. Dyck, and Robert Kane. The Reliability and Validity of the Positive and Negative Perfectionism Scale. Wiley-Blackwell Publishing Ltd, 2011.

MLA (9th ed.) Citation

Egan, Sarah, et al. The Reliability and Validity of the Positive and Negative Perfectionism Scale. Wiley-Blackwell Publishing Ltd, 2011.