APA

Hardy S. A., . (1956). The open sea: its natural history. London, UK: Collins.

Chicago

Hardy Sir Alister, . 1956. The open sea: its natural history. London, UK: Collins.

Harvard

Hardy S. A., . (1956). The open sea: its natural history. London, UK: Collins.

MLA

Hardy Sir Alister, . The open sea: its natural history. London, UK: Collins. 1956.