Schreiber, G., Stegemann, B., Vogel, D., MacMurry, D. S., Osers, E., Willmot, L., & Falla, P. (2001). The Mediterranean, South-east Europe, and North Africa 1939 - 1941: From Italy`s declaration of non-belligerence to the entry of the United States into the war.

Schreiber, Gerhard, Bernd Stegemann, Detlef Vogel, Dean S. MacMurry, Ewald Osers, Louise Willmot, and P.S Falla. The Mediterranean, South-east Europe, and North Africa 1939 - 1941: From Italy`s Declaration of Non-belligerence to the Entry of the United States into the War. 2001.

Schreiber, Gerhard, et al. The Mediterranean, South-east Europe, and North Africa 1939 - 1941: From Italy`s Declaration of Non-belligerence to the Entry of the United States into the War. 2001.