APA (7th ed.) Citation

Stel, J. H., & Kuijper, R. P. (1991). Lower palaeozoic erratic favositids from the Island of Sylt, Germany. Nationaal Natuurhistorisch Museum.

Chicago Style (17th ed.) Citation

Stel, Jan H., and Rene P. Kuijper. Lower Palaeozoic Erratic Favositids from the Island of Sylt, Germany. Leiden: Nationaal Natuurhistorisch Museum, 1991.

MLA (9th ed.) Citation

Stel, Jan H., and Rene P. Kuijper. Lower Palaeozoic Erratic Favositids from the Island of Sylt, Germany. Nationaal Natuurhistorisch Museum, 1991.