Cita APA (7a ed.)

Hayward, P., & Ryland, J. S. (1979). British ascophoran bryozoans: Keys and notes for the identification of the species. Academic Press.

Cita Chicago Style (17a ed.)

Hayward, P.J, y J. S. Ryland. British Ascophoran Bryozoans: Keys and Notes for the Identification of the Species. London [etc.]: Academic Press, 1979.

Cita MLA (9a ed.)

Hayward, P.J, y J. S. Ryland. British Ascophoran Bryozoans: Keys and Notes for the Identification of the Species. Academic Press, 1979.