Παραπομπή APA

Ryland, J. S. (1970). Bryozoans. Hutchinson university library.

Παραπομπή Chicago Style

Ryland, J. S. Bryozoans. London: Hutchinson university library, 1970.

Παραπομπή MLA

Ryland, J. S. Bryozoans. Hutchinson university library, 1970.