K. Koffka

On problems of colour-perception

K. Koffka, 1936 .

New studies in transparency, form and color

Grace Moore Heider, K. Koffka, K. Koffka, 1933 .

Some problems of space perception.

K. Koffka, 1930 .

INTROSPECTION AND THE METHOD OF PSYCHOLOGY1

K. Koffka, 1924 .

The growth of the mind

R. M. Ogden, K. Koffka, K. Koffka, 1924 .

Organization in higher mental processes

M. R. Harrower, K. Koffka, K. Koffka, 1933 .