Ettensohn, C. A. [., Wray,Gregory A. [ed.], & Wessel, G. M. (2004). Development of sea urchins, ascidians and other invertebrate deuterostomes: Experimental approaches. Elsevier Academic.

Ettensohn, Charles A. [ed.], Wray,Gregory A. [ed.], and Gray M.[ed.] Wessel. Development of Sea Urchins, Ascidians and Other Invertebrate Deuterostomes: Experimental Approaches. California: Elsevier Academic, 2004.

Ettensohn, Charles A. [ed.], et al. Development of Sea Urchins, Ascidians and Other Invertebrate Deuterostomes: Experimental Approaches. Elsevier Academic, 2004.