APA   Click to copy
Einstein, A. (1905). On the Movement of Small Particles Suspended in Stationary Liquids Required by the Molecular-Kinetic Theory of Heat. Annalen Der Physik, 549–560.

Chicago/Turabian   Click to copy
Einstein, Albert. “On the Movement of Small Particles Suspended in Stationary Liquids Required by the Molecular-Kinetic Theory of Heat.” Annalen der Physik (1905): 549–560.

MLA   Click to copy
Einstein, Albert. “On the Movement of Small Particles Suspended in Stationary Liquids Required by the Molecular-Kinetic Theory of Heat.” Annalen Der Physik, 1905, pp. 549–60.

@article{einstein1905a,
  title = {On the Movement of Small Particles Suspended in Stationary Liquids Required by the Molecular-Kinetic Theory of Heat},
  year = {1905},
  journal = {Annalen der Physik},
  pages = {549-560},
  author = {Einstein, Albert}
}