Helen, Helen Mellanby, & Helen Mellanby. (1953). Animal life in freshwater (5.). London.
Chicago Style aipamenaHelen, Helen Mellanby, and Helen Mellanby. Animal Life in Freshwater. 5. London, 1953.
MLA aipamenaHelen, et al. Animal Life in Freshwater. 5. London, 1953.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.