APA (7th ed.) Citation

Tolba, M. K. (1992). The world environment 1972 - 1992: Two decades of challenge. Chapman & Hall.

Chicago Style (17th ed.) Citation

Tolba, Mostafa K. The World Environment 1972 - 1992: Two Decades of Challenge. London [u.a.]: Chapman & Hall, 1992.

MLA (9th ed.) Citation

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