Cita APA

Hopkins, M. J., Chen, F., Hu, S., & Zhang, Z. (2017). The oldest known digestive system consisting of both paired digestive glands and a crop from exceptionally preserved trilobites of the Guanshan Biota (Early Cambrian, China). PLoS One.

Chicago Style Citation

Hopkins, Melanie J., Feiyang Chen, Shixue Hu, i Zhifei Zhang. "The Oldest Known Digestive System Consisting of Both Paired Digestive Glands and a Crop From Exceptionally Preserved Trilobites of the Guanshan Biota (Early Cambrian, China)." PLoS One 2017.

Cita MLA

Hopkins, Melanie J., Feiyang Chen, Shixue Hu, i Zhifei Zhang. "The Oldest Known Digestive System Consisting of Both Paired Digestive Glands and a Crop From Exceptionally Preserved Trilobites of the Guanshan Biota (Early Cambrian, China)." PLoS One 2017.