Flower, K. (1987). Serving secretly: An intelligence chief on record: Rhodesia into Zimbabwe, 1964 to 1981. John Murray.
Citazione stile Chigago Style (17a edizione)Flower, Ken. Serving Secretly: An Intelligence Chief on Record: Rhodesia into Zimbabwe, 1964 to 1981. London: John Murray, 1987.
Citatione MLA (9a ed.)Flower, Ken. Serving Secretly: An Intelligence Chief on Record: Rhodesia into Zimbabwe, 1964 to 1981. John Murray, 1987.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.