APA-viite (7. p.)

Porter, T. M. Reforming vision: The engineer Le Play learns to observe society sagely / Theodor M. Porter. Histories of scientific observation.(2011).

Chicago-viite (17. p.)

Porter, Theodor M. "Reforming Vision: The Engineer Le Play Learns to Observe Society Sagely / Theodor M. Porter." Histories of Scientific Observation.(2011) .

MLA-viite (8. p.)

Porter, Theodor M. "Reforming Vision: The Engineer Le Play Learns to Observe Society Sagely / Theodor M. Porter." Histories of Scientific Observation.(2011), .