Haldane, J. B. S. (1930). Possible worlds: And other essays. Chatto and Windus.
Cita Chicago (17th ed.)Haldane, J. B. S. Possible Worlds: And Other Essays. London: Chatto and Windus, 1930.
Cita MLA (8th ed.)Haldane, J. B. S. Possible Worlds: And Other Essays. Chatto and Windus, 1930.
Atenció: Aquestes cites poden no estar 100% correctes.