APA (7th ed.) Citation

Higgins, A. K., Friedrichsen, J. D., Rex, D. C., & Gledhill, A. R. Early Proterozoic Isotopic Ages in the East Greenland Caledonian Fold Belt.

Chicago Style (17th ed.) Citation

Higgins, A. K., J. D. Friedrichsen, D. C. Rex, and A. R. Gledhill. Early Proterozoic Isotopic Ages in the East Greenland Caledonian Fold Belt.

MLA (9th ed.) Citation

Higgins, A. K., et al. Early Proterozoic Isotopic Ages in the East Greenland Caledonian Fold Belt.