APA   Click to copy
Einstein, A. (1907). On the Relativity Principle and the Conclusions Drawn from It. Jahrbuch der Radioaktivität.

Chicago/Turabian   Click to copy
Einstein, Albert. “On the Relativity Principle and the Conclusions Drawn from It.” Jahrbuch Der Radioaktivität, 1907.

MLA   Click to copy
Einstein, Albert. “On the Relativity Principle and the Conclusions Drawn from It.” Jahrbuch Der Radioaktivität, 1907, pp. 411–62.

@misc{einstein1907a,
  title = {On the Relativity Principle and the Conclusions Drawn from It},
  year = {1907},
  journal = {Jahrbuch der Radioaktivität},
  pages = {411-462},
  author = {Einstein, Albert}
}