Playfair et al. 1954, стр. 283 Playfair, Major-General I. S. O.; Stitt, Commander G. M. S.; Molony, Brigadier C. J. C.; Toomer, Air Vice-Marshal S. E. (1954). Butler, J. R. M., ур. The Mediterranean and Middle East: The Early Successes Against Italy (to May 1941). History of the Second World War, United Kingdom Military Series. I. London: HMSO. OCLC59086236.
Playfair et al. 1954, стр. 284. Playfair, Major-General I. S. O.; Stitt, Commander G. M. S.; Molony, Brigadier C. J. C.; Toomer, Air Vice-Marshal S. E. (1954). Butler, J. R. M., ур. The Mediterranean and Middle East: The Early Successes Against Italy (to May 1941). History of the Second World War, United Kingdom Military Series. I. London: HMSO. OCLC59086236.
Playfair et al. 1954, стр. 286 Playfair, Major-General I. S. O.; Stitt, Commander G. M. S.; Molony, Brigadier C. J. C.; Toomer, Air Vice-Marshal S. E. (1954). Butler, J. R. M., ур. The Mediterranean and Middle East: The Early Successes Against Italy (to May 1941). History of the Second World War, United Kingdom Military Series. I. London: HMSO. OCLC59086236.
Playfair et al. 1954, стр. 287 Playfair, Major-General I. S. O.; Stitt, Commander G. M. S.; Molony, Brigadier C. J. C.; Toomer, Air Vice-Marshal S. E. (1954). Butler, J. R. M., ур. The Mediterranean and Middle East: The Early Successes Against Italy (to May 1941). History of the Second World War, United Kingdom Military Series. I. London: HMSO. OCLC59086236.