APA   Click to copy
Verhoeven, G. J. (2007). Did the Digital (R)Evolution Change the Concept of Focal Length? AARGnews, 34, 30–35.

Chicago/Turabian   Click to copy
Verhoeven, Geert J. “Did the Digital (R)Evolution Change the Concept of Focal Length?” AARGnews 34 (2007): 30–35.

MLA   Click to copy
Verhoeven, Geert J. “Did the Digital (R)Evolution Change the Concept of Focal Length?” AARGnews, vol. 34, 2007, pp. 30–35.

@article{verhoeven2007a,
  title = {Did the Digital (R)Evolution Change the Concept of Focal Length?},
  year = {2007},
  journal = {AARGnews},
  pages = {30-35},
  volume = {34},
  author = {Verhoeven, Geert J.}
}