Friend, J., & Hickling, A. (1987). Planning under pressure: The strategic choice approach. Pergamon Press.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিFriend, John, এবং Allen Hickling. Planning Under Pressure: The Strategic Choice Approach. [Oxford Oxfordshire] ; New York: Pergamon Press, 1987.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিFriend, John, এবং Allen Hickling. Planning Under Pressure: The Strategic Choice Approach. Pergamon Press, 1987.