APA-referens (7:e uppl.)

Maas, H. Sorting things out: The economist as an armchair observer / Harro Maas. Histories of scientific observation.(2011).

Chicago-referens (17:e uppl.)

Maas, Harro. "Sorting Things Out: The Economist as an Armchair Observer / Harro Maas." Histories of Scientific Observation.(2011) .

MLA-referens (8:e uppl.)

Maas, Harro. "Sorting Things Out: The Economist as an Armchair Observer / Harro Maas." Histories of Scientific Observation.(2011), .