Cita APA (7a ed.)

Efford, I. E., & Smith, B. M. (1972). Energy and the environment. Institute of Resource Ecology, University of British Columbia.

Cita Chicago Style (17a ed.)

Efford, Ian E., y Barbara M. Smith. Energy and the Environment. Vancouver: Institute of Resource Ecology, University of British Columbia, 1972.

Cita MLA (9a ed.)

Efford, Ian E., y Barbara M. Smith. Energy and the Environment. Institute of Resource Ecology, University of British Columbia, 1972.