Cita APA (7th ed.)

Tolba, M. K. (1992). Saving our planet: Challenges and hopes. Chapman & Hall.

Cita Chicago (17th ed.)

Tolba, Mostafa Kamal. Saving Our Planet: Challenges and Hopes. London: Chapman & Hall, 1992.

Cita MLA (9th ed.)

Tolba, Mostafa Kamal. Saving Our Planet: Challenges and Hopes. Chapman & Hall, 1992.