APA-viite (7. p.)

Papworth, J., & Egan, E. (1987). The human factor in the global crisis.

Chicago-viite (17. p.)

Papworth, John, ja Eileen Egan. The Human Factor in the Global Crisis. 1987.

MLA-viite (8. p.)

Papworth, John, ja Eileen Egan. The Human Factor in the Global Crisis. 1987.