APA-viite (7. p.)

Gough,David. oliver, S. T. (2017). An introduction to systematic reviews (2nd.). Sage publications Ltd.

Chicago-viite (17. p.)

Gough,David. oliver, Sandy. Thomas. An Introduction to Systematic Reviews. 2nd. London: Sage publications Ltd, 2017.

MLA-viite (8. p.)

Gough,David. oliver, Sandy. Thomas. An Introduction to Systematic Reviews. 2nd. Sage publications Ltd, 2017.