APA-ийн эшлэл(7 дахь хэвлэлт)

(1990). Natural gas: Its role and potential in economic development. Westview pr..

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Natural Gas: Its Role and Potential in Economic Development. Boulder: Westview pr., 1990.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Natural Gas: Its Role and Potential in Economic Development. Westview pr., 1990.