Cita APA (7a ed.)

Darwin, C., Barrett, P. H., & Freeman, R. B. (1988). A monograph of the sub-class Cirripedia, 2: The Balanidae, Pt. 2. Pickering.

Cita Chicago Style (17a ed.)

Darwin, Charles, Paul H. Barrett, y R. B. Freeman. A Monograph of the Sub-class Cirripedia, 2: The Balanidae, Pt. 2. London: Pickering, 1988.

Cita MLA (8a ed.)

Darwin, Charles, et al. A Monograph of the Sub-class Cirripedia, 2: The Balanidae, Pt. 2. Pickering, 1988.