APA Zitierstil

Helen, Helen Mellanby, & Helen Mellanby. (1953). Animal life in freshwater (5.). London.

Chicago Zitierstil

Helen, Helen Mellanby, und Helen Mellanby. Animal Life in Freshwater. 5. London, 1953.

MLA Zitierstil

Helen, et al. Animal Life in Freshwater. 5. London, 1953.