APA (7e ed.) Bronvermelding

COnyango & Tolba Mostafa. (1992). The World environment 1972-1992: Two decades of challenge. Chapman & Hall.

Chicago (17e ed.) Bronvermelding

COnyango en Tolba Mostafa. The World Environment 1972-1992: Two Decades of Challenge. London: Chapman & Hall, 1992.

MLA (9e ed.) Bronvermelding

COnyango en Tolba Mostafa. The World Environment 1972-1992: Two Decades of Challenge. Chapman & Hall, 1992.