APA (7th ed.) Citation

Darwin, C., & Barlow, N. (1963). Darwin's ornithological notes: Cambridge University handlist (1960) no. 29 (ii). The Trustees of the British Museum.

Chicago Style (17th ed.) Citation

Darwin, Charles, and Nora Barlow. Darwin's Ornithological Notes: Cambridge University Handlist (1960) No. 29 (ii). London: The Trustees of the British Museum, 1963.

MLA (8th ed.) Citation

Darwin, Charles, and Nora Barlow. Darwin's Ornithological Notes: Cambridge University Handlist (1960) No. 29 (ii). The Trustees of the British Museum, 1963.