APA Style
Walter vergara, Nelson E. Hay,. (1990).
Natural gas its role and potential in economic development (-).
America:
Westview press.
Chicago Style
Walter vergara, Nelson E. Hay,.
Natural gas its role and potential in economic development.
-
America:
Westview press,
1990.
Text.
MLA Style
Walter vergara, Nelson E. Hay,.
Natural gas its role and potential in economic development.
-
America:
Westview press,
1990.
Text.
Turabian Style
Walter vergara, Nelson E. Hay,.
Natural gas its role and potential in economic development.
-
America:
Westview press,
1990.
Print.