APA (7th ed.) Citation

Ohlsson, M. C., Wohlin, C., & Regnell, B. (1998). A project effort estimation study. [s.n.].

Chicago Style (17th ed.) Citation

Ohlsson, M. C., Claes Wohlin, and B. Regnell. A Project Effort Estimation Study. [S.l.]: [s.n.], 1998.

MLA (9th ed.) Citation

Ohlsson, M. C., et al. A Project Effort Estimation Study. [s.n.], 1998.