Watt, D. C., Spencer, F., & Brown, N. (1967). A history of the world in the twentieth century / [by] D.C. Watt, Frank Spencer [and] Neville Brown. Hodder and Stoughton.
Chicago Style (17th ed.) CitationWatt, Donald Cameron, Frank Spencer, and Neville Brown. A History of the World in the Twentieth Century / [by] D.C. Watt, Frank Spencer [and] Neville Brown. London: Hodder and Stoughton, 1967.
MLA (9th ed.) CitationWatt, Donald Cameron, et al. A History of the World in the Twentieth Century / [by] D.C. Watt, Frank Spencer [and] Neville Brown. Hodder and Stoughton, 1967.
Warning: These citations may not always be 100% accurate.