APA-referens (7:e uppl.)

Li, X., Giardini, D., & Woodhouse, J. (1991). LARGE-SCALE 3-DIMENSIONAL EVEN-DEGREE STRUCTURE OF THE EARTH FROM SPLITTING OF LONG-PERIOD NORMAL-MODES.

Chicago-referens (17:e uppl.)

Li, X., D. Giardini, och J. Woodhouse. LARGE-SCALE 3-DIMENSIONAL EVEN-DEGREE STRUCTURE OF THE EARTH FROM SPLITTING OF LONG-PERIOD NORMAL-MODES. 1991.

MLA-referens (9:e uppl.)

Li, X., et al. LARGE-SCALE 3-DIMENSIONAL EVEN-DEGREE STRUCTURE OF THE EARTH FROM SPLITTING OF LONG-PERIOD NORMAL-MODES. 1991.