Cushman, J. A. (1950). Foraminifera: Their classification and economic use (4. edition, revised and enlarged with an illustrated key to the genera, 2. print.). Harvard University Press.
Chicago-Zitierstil (17. Ausg.)Cushman, Joseph A. Foraminifera: Their Classification and Economic Use. 4. edition, revised and enlarged with an illustrated key to the genera, 2. print. Cambridge, Massachusetts: Harvard University Press, 1950.
MLA-Zitierstil (9. Ausg.)Cushman, Joseph A. Foraminifera: Their Classification and Economic Use. 4. edition, revised and enlarged with an illustrated key to the genera, 2. print. Harvard University Press, 1950.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.