Cita APA (7a ed.)

Ellis, W. D., & Koffka, K. (1938). A source book of Gestalt psychology. Routledge & Kegan Paul Ltd.

Cita Chicago Style (17a ed.)

Ellis, Willis Davis, y Kurt Koffka. A Source Book of Gestalt Psychology. London: Routledge & Kegan Paul Ltd, 1938.

Cita MLA (9a ed.)

Ellis, Willis Davis, y Kurt Koffka. A Source Book of Gestalt Psychology. Routledge & Kegan Paul Ltd, 1938.