HOW TO REFERENCE A PUBLICATION indent 4mm Paper in journal: Smith, J.M., Adams, B.A. & Wilson, A. (2002). The Future for Asteroid Exploration. Planet. Space Sci. 285(11), 123-126. Book: Johnson, A.B. & Radice, X.T. (2002). Comets for Beginners, Cambridge University Press, Cambridge, UK, pp103-106. Chapter in Book: Geiss, J. & Williams, P.S. (1999). Primordial Abundances of Hydrogen and Helium Isotopes. In Origin and Evolution of the Elements (Eds. N. Prantzos, E. Vangioni-Flam & M. Casse), Cambridge University Press, Cambridge, UK, pp89-106. Paper in Proceedings (including ESA Proceedings, SP-xxx): Svalgaard, L. & LeSager, P. (2003). What Heliosesimology Teaches us About the Sun. In Proc. 4th. ISCS ‘Solar Variability as an Input to the Earth’s Environment’ (Eds. H. Lacoste & H. Xerxes), ESA SP-535, ESA Publications Division, European Space Agency, Noordwijk, The Netherlands, pp147-153. Paper in CD-only Proceedings (including ESA Proceedings, SP-xxx): Svalgaard, L. & LeSager, P. (2003). What Heliosesimology Teaches us About the Sun. In Proc. 4th. ISCS ‘Solar Variability as an Input to the Earth’s Environment’ (Eds. H. Lacoste & H. Xerxes), ESA SP-535 (CD-ROM), ESA Publications Division, European Space Agency, Noordwijk, The Netherlands. Note: for Proceedings published in hardcopy plus CD, refer to the hardcopy version and use page numbers (see previous example). Web: Smith, J.M. (2003). The Future for Asteroid Exploration. Online at http://www.xxxxxxxx.xxxxxxx (as of 3 January 2004). Note: high-level publications should avoid references to web sites if at all possible. References should be to a permanent, unchanging source; web sites are ephemeral. Calling out References In body text, call out a reference using parentheses: (Smith, 1996) (Smith, 1996a; 1996b; 1999) (Smith & Jones, 1992) (Smith et al., 2004) use ascending year order use ‘et al.’ for 3 or more authors.