APA   Click to copy
Kemper, C., Dörendahl, J., & Greiff, S. (2017). The LUXXprofile. Manual. Esch sur Alzette: University of Luxembourg.

Chicago/Turabian   Click to copy
Kemper, C., J. Dörendahl, and S. Greiff. The LUXXprofile. Manual. Esch sur Alzette: University of Luxembourg, 2017.

MLA   Click to copy
Kemper, C., et al. The LUXXprofile. Manual. University of Luxembourg, 2017.

@manual{kemper2017a,
  title = {The LUXXprofile. Manual},
  year = {2017},
  address = {Esch sur Alzette},
  publisher = {University of Luxembourg},
  author = {Kemper, C. and Dörendahl, J. and Greiff, S.}
}