APA ציטוט

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

Chicago Edition Citation

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

ציטוט MLA

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