Zhang, Y., & Lenz, A. C. (1998). Early Devonian graptolites from Southwest Yunnan, China.
Cita Chicago Style (17a ed.)Zhang, Yuan-Dong, y Alfred C. Lenz. Early Devonian Graptolites from Southwest Yunnan, China. 1998.
Cita MLA (8a ed.)Zhang, Yuan-Dong, y Alfred C. Lenz. Early Devonian Graptolites from Southwest Yunnan, China. 1998.
Precaución: Estas citas no son 100% exactas.