Original:  For example, DeShon & Gillespie stated that in the literature, DeShon, R. P., & Gillespie, J. Z. (2005).
Revised:  For example, DeShon & Gillespie stated that goal orientation has been conceptualized as a trait, quasi-trait, and state. DeShon, R. P., & Gillespie, J. Z. (2005).
Edit intent: meaning-changed