Cita APA (7a ed.)

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.