APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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