Παραπομπή APA

Walford, L. A. (1958). Living resources of the sea. Ronald press.

Παραπομπή Chicago Style

Walford, Lionel A. Living Resources of the Sea. New york: Ronald press, 1958.

Παραπομπή MLA

Walford, Lionel A. Living Resources of the Sea. Ronald press, 1958.