Cooper, G. A., & Fitch, J. E. (1971). Eocene brachiopods from Eua, Tonga: Brachiopods representing six genera are recognized from tuffaceous limestone. US Gov. Print. Off.
Chicago-Zitierstil (17. Ausg.)Cooper, Gustav Arthur, und John E. Fitch. Eocene Brachiopods from Eua, Tonga: Brachiopods Representing Six Genera Are Recognized from Tuffaceous Limestone. Washington: US Gov. Print. Off, 1971.
MLA-Zitierstil (9. Ausg.)Cooper, Gustav Arthur, und John E. Fitch. Eocene Brachiopods from Eua, Tonga: Brachiopods Representing Six Genera Are Recognized from Tuffaceous Limestone. US Gov. Print. Off, 1971.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.