Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.

APA Citation Edition Citation

Hadden, R. L. (2012). The Geology of Yemen: An Annotated Bibliography of Yemen's Geology, Geography and Earth Science. Army Geospatial Center - US Army Corps of Engineers.

Chicago Citation Edition Citation

Hadden, R. Lee. The Geology of Yemen: An Annotated Bibliography of Yemen's Geology, Geography and Earth Science. Alexandria, Virginina: Army Geospatial Center - US Army Corps of Engineers, 2012.

MLA Citation Edition Citation

Hadden, R. Lee. The Geology of Yemen: An Annotated Bibliography of Yemen's Geology, Geography and Earth Science. Army Geospatial Center - US Army Corps of Engineers, 2012.