(1977). Coal for the future: Progress with "Plan for Coal" and prospects to the year 2000. Department of Energy.
Chicago-Zitierstil (17. Ausg.)Coal for the Future: Progress with "Plan for Coal" and Prospects to the Year 2000. London: Department of Energy, 1977.
MLA-Zitierstil (9. Ausg.)Coal for the Future: Progress with "Plan for Coal" and Prospects to the Year 2000. Department of Energy, 1977.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.