Harrison, F., & Cowden, R. (1976). Aspects of sponge biology. Academic Press.
Chicago Style aipamenaHarrison, F.W, and R.R Cowden. Aspects of Sponge Biology. New York, New York: Academic Press, 1976.
MLA aipamenaHarrison, F.W, and R.R Cowden. Aspects of Sponge Biology. Academic Press, 1976.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.