Helve, J. (1972). A comparative study of several diagnostic tests of colour vision used for measuring types and degrees of congenital red-green defects. Munksgaard.
Chicago Style (17th ed.) CitationHelve, Jyrki. A Comparative Study of Several Diagnostic Tests of Colour Vision Used for Measuring Types and Degrees of Congenital Red-green Defects. Copenhagen: Munksgaard, 1972.
MLA (9th ed.) CitationHelve, Jyrki. A Comparative Study of Several Diagnostic Tests of Colour Vision Used for Measuring Types and Degrees of Congenital Red-green Defects. Munksgaard, 1972.
Warning: These citations may not always be 100% accurate.