O'Sullivan, M., Davies, M. L., & Thomson, G. D. (1938). Twenty years a-growing. Penguin.
Cita Chicago Style (17a ed.)O'Sullivan, Maurice, Moya Llewelyn Davies, y George Derwent Thomson. Twenty Years A-growing. Harmondsworth [etc.]: Penguin, 1938.
Cita MLA (9a ed.)O'Sullivan, Maurice, et al. Twenty Years A-growing. Penguin, 1938.
Precaución: Estas citas no son 100% exactas.