Greene, R. P. (1980). Future coal prospects: Country and regional assessments. Cambridge: Ballinger Publishing.
استشهاد بنمط شيكاغوGreene, Robert P. Future Coal Prospects: Country and Regional Assessments. Cambridge: Ballinger Publishing, 1980.
MLA استشهادGreene, Robert P. Future Coal Prospects: Country and Regional Assessments. Cambridge: Ballinger Publishing, 1980.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.