APA   Click to copy
Paus-Hasebrink, I., Sinner, P., & Prochazka, F. (2013). FAQ 8: When is it good to use a longitudinal design? In K. Ólafsson, S. Livingstone, & L. Haddon (Eds.), How to research children and online technologies? {Frequently} asked questions and best practice (pp. 25–27). London: LSE.

Chicago/Turabian   Click to copy
Paus-Hasebrink, Ingrid, Philip Sinner, and Fabian Prochazka. “FAQ 8: When Is It Good to Use a Longitudinal Design?” In How to Research Children and Online Technologies? {Frequently} Asked Questions and Best Practice, edited by Kjartan Ólafsson, Sonia Livingstone, and Leslie Haddon, 25–27. London: LSE, 2013.

MLA   Click to copy
Paus-Hasebrink, Ingrid, et al. “FAQ 8: When Is It Good to Use a Longitudinal Design?” How to Research Children and Online Technologies? {Frequently} Asked Questions and Best Practice, edited by Kjartan Ólafsson et al., LSE, 2013, pp. 25–27.

@incollection{paus-hasebrink2013a,
  title = {FAQ 8: When is it good to use a longitudinal design?},
  year = {2013},
  address = {London},
  pages = {25-27},
  publisher = {LSE},
  author = {Paus-Hasebrink, Ingrid and Sinner, Philip and Prochazka, Fabian},
  editor = {Ólafsson, Kjartan and Livingstone, Sonia and Haddon, Leslie},
  booktitle = {How to research children and online technologies? {Frequently} asked questions and best practice}
}