WATCYN-JONES, P. (1986). Test your vocabulary book 4. Penguin Books.
Chicago Style aipamenaWATCYN-JONES, Peter. Test Your Vocabulary Book 4. Harmonsworth: Penguin Books, 1986.
MLA aipamenaWATCYN-JONES, Peter. Test Your Vocabulary Book 4. Penguin Books, 1986.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.