APA
Heldring L., National Bureau of Economic Research, Robinson J. A. & Vollmer S. (2015). Monks, gents and industrialists. Cambridge: NBER.
Chicago
Heldring Leander, National Bureau of Economic Research, Robinson James A and Vollmer Sebastian. 2015. Monks, gents and industrialists. Cambridge: NBER.
Harvard
Heldring L., National Bureau of Economic Research, Robinson J. A. and Vollmer S. (2015). Monks, gents and industrialists. Cambridge: NBER.
MLA
Heldring Leander, National Bureau of Economic Research, Robinson James A and Vollmer Sebastian. Monks, gents and industrialists. Cambridge: NBER. 2015.