APA

De Bono E., . (1990). Lateral thinking: a textbook of creativity. New York: Penguin Books.

Chicago

De Bono Edward, . 1990. Lateral thinking: a textbook of creativity. New York: Penguin Books.

Harvard

De Bono E., . (1990). Lateral thinking: a textbook of creativity. New York: Penguin Books.

MLA

De Bono Edward, . Lateral thinking: a textbook of creativity. New York: Penguin Books. 1990.