(1977). THE PENGUIN DICTIONARY OF QUOTATIONS. PENGUIN BOOKS.
Chicago Style aipamenaTHE PENGUIN DICTIONARY OF QUOTATIONS. NEWYORK: PENGUIN BOOKS, 1977.
MLA aipamenaTHE PENGUIN DICTIONARY OF QUOTATIONS. PENGUIN BOOKS, 1977.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.