Cita APA

Riccardi, A. C., Westermann, G. E. G., & Elmi, S. (1991). Biostratigraphy of the upper Bajocian-middle Callovian (Middle Jurassic), South America. Web

Citación estilo Chicago

Riccardi, Alberto Carlos, G. E. G. Westermann, and S. Elmi. Biostratigraphy of the Upper Bajocian-middle Callovian (Middle Jurassic), South America. 1991.

Cita MLA

Riccardi, Alberto Carlos, G. E. G. Westermann, and S. Elmi. Biostratigraphy of the Upper Bajocian-middle Callovian (Middle Jurassic), South America. 1991.