Bullock, R. H. (2014). The Little Seagull handbook. New Yersey: W.W. Norton & Company.
Chicago Style aipamenaBullock, Richard H. The Little Seagull Handbook. New Yersey: W.W. Norton & Company, 2014.
MLA aipamenaBullock, Richard H. The Little Seagull Handbook. New Yersey: W.W. Norton & Company, 2014.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.