APA

Clark H. L., . (1933). A handbook of the littoral echinoderms of Porto Rico and the other West Indian Islands. New York: New York Academy of Sciences.

Chicago

Clark Hubert Lyman, . 1933. A handbook of the littoral echinoderms of Porto Rico and the other West Indian Islands. New York: New York Academy of Sciences.

Harvard

Clark H. L., . (1933). A handbook of the littoral echinoderms of Porto Rico and the other West Indian Islands. New York: New York Academy of Sciences.

MLA

Clark Hubert Lyman, . A handbook of the littoral echinoderms of Porto Rico and the other West Indian Islands. New York: New York Academy of Sciences. 1933.