Cita APA (7th ed.)

Ahmad, Y. J., El Serafy, S., & Lutz, E. (1989). Environmental Accounting for Sustainable Development: A UNEP-World Bank Symposium. The World Bank.

Cita Chicago (17th ed.)

Ahmad, Yusuf J., Salah El Serafy, i Ernst Lutz. Environmental Accounting for Sustainable Development: A UNEP-World Bank Symposium. Washington, D.C.: The World Bank, 1989.

Cita MLA (9th ed.)

Ahmad, Yusuf J., et al. Environmental Accounting for Sustainable Development: A UNEP-World Bank Symposium. The World Bank, 1989.