Cita APA

Gutiérrez-Marco, J. C., Yanev, S. N., Sachanski, V. V., Rábano, I., & Lakova, I. (2002). New findings of trilobites and graptolites in the Ordovician of Bulgaria.

Citación estilo Chicago

Gutiérrez-Marco, J. C., Slavcho N. Yanev, Valeri V. Sachanski, Isabel Rábano, y Iskra Lakova. New Findings of Trilobites and Graptolites in the Ordovician of Bulgaria. 2002.

Cita MLA

Gutiérrez-Marco, J. C., et al. New Findings of Trilobites and Graptolites in the Ordovician of Bulgaria. 2002.