APA-ийн эшлэл(7 дахь хэвлэлт)

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

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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

MLA -ийн эшлэл (9 дэх хэвлэлт)

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