Weckroth, J. (1964). Studies in colour after-images: Presentation of basic data and previous studies, with some new observations and a theoretical discussion. Suomalainen Tiedeakatemia.
Chicago-referens (17:e uppl.)Weckroth, Johan. Studies in Colour After-images: Presentation of Basic Data and Previous Studies, with Some New Observations and a Theoretical Discussion. Helskinki: Suomalainen Tiedeakatemia, 1964.
MLA-referens (8:e uppl.)Weckroth, Johan. Studies in Colour After-images: Presentation of Basic Data and Previous Studies, with Some New Observations and a Theoretical Discussion. Suomalainen Tiedeakatemia, 1964.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.