APA (7th ed.) Citation

Xu, B., Yao, T., Tian, L., & Chappellaz, J. (1999). Variation of CH4 concentrations recorded in Dunde ice core bubbles. Chinese Science Bulletin, 44(4), 383.

Chicago Style (17th ed.) Citation

Xu, Baiqing, Tandong Yao, Lide Tian, and J. Chappellaz. "Variation of CH4 Concentrations Recorded in Dunde Ice Core Bubbles." Chinese Science Bulletin 44, no. 4 (1999): 383.

MLA (8th ed.) Citation

Xu, Baiqing, et al. "Variation of CH4 Concentrations Recorded in Dunde Ice Core Bubbles." Chinese Science Bulletin, vol. 44, no. 4, 1999, p. 383.