O'Sullivan, M., Davies, M. L., Thomson, G. D., & Forster, E. M. (1960). Twenty years A-Growing. Viking Press.

O'Sullivan, Maurice, Moya Llewelyn Davies, George Derwent Thomson, and E. M. Forster. Twenty Years A-Growing. New York: Viking Press, 1960.

O'Sullivan, Maurice, et al. Twenty Years A-Growing. Viking Press, 1960.