APA

Hartmann G. W., . (1936). Gestalt Psychology. New York: Ronald Press.

Chicago

Hartmann George W, . 1936. Gestalt Psychology. New York: Ronald Press.

Harvard

Hartmann G. W., . (1936). Gestalt Psychology. New York: Ronald Press.

MLA

Hartmann George W, . Gestalt Psychology. New York: Ronald Press. 1936.