Headey, B. (1974). British cabinet Ministers: The role of politicians in executive office. George Allen & Unwin.
Chicago-tyylinen lähdeviittausHeadey, Bruce. British Cabinet Ministers: The Role of Politicians in Executive Office. London: George Allen & Unwin, 1974.
MLA-viiteHeadey, Bruce. British Cabinet Ministers: The Role of Politicians in Executive Office. George Allen & Unwin, 1974.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.