Cita APA (7th ed.)

Kirkwood, R. C., & Longley, A. J. (1995). Clean technology and the environment. Blackie Academic & Professional.

Cita Chicago (17th ed.)

Kirkwood, Ralph C., i A. J. Longley. Clean Technology and the Environment. Londres: Blackie Academic & Professional, 1995.

Cita MLA (9th ed.)

Kirkwood, Ralph C., i A. J. Longley. Clean Technology and the Environment. Blackie Academic & Professional, 1995.