APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (8e ed.) Bronvermelding

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