Cooper, K. W. (1964). The First Fossil Tardigrade: Beorn Leggi Cooper, From Cretaceous Amber. Zenodo.
Cita Chicago (17th ed.)Cooper, Kenneth W. The First Fossil Tardigrade: Beorn Leggi Cooper, From Cretaceous Amber. Zenodo, 1964.
Cita MLA (9th ed.)Cooper, Kenneth W. The First Fossil Tardigrade: Beorn Leggi Cooper, From Cretaceous Amber. Zenodo, 1964.
Atenció: Aquestes cites poden no estar 100% correctes.