APA aipamena

Emery, F. E. (1969). Systems thinking. England: Penguin Books.

Chicago Style aipamena

Emery, F. E. Systems Thinking. England: Penguin Books, 1969.

MLA aipamena

Emery, F. E. Systems Thinking. England: Penguin Books, 1969.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.