Lespérance, P. J., & Weissenberger, J. A. W. (1998). Trilobites of the Pabos Formation (Ashgillian, Upper Ordovician) Percé area, Quebec.
Cita Chicago Style (17a ed.)Lespérance, Pierre J., y John A. W. Weissenberger. Trilobites of the Pabos Formation (Ashgillian, Upper Ordovician) Percé Area, Quebec. 1998.
Cita MLA (8a ed.)Lespérance, Pierre J., y John A. W. Weissenberger. Trilobites of the Pabos Formation (Ashgillian, Upper Ordovician) Percé Area, Quebec. 1998.
Precaución: Estas citas no son 100% exactas.