Gaya APA

Barber, B, E. (2004). No excuse leadership : lessons from the U.S. army's elite rangers.-- (Cet. 1.--). New Jersey: John Wiley & Sons.

Gaya MLA

Barber, Brace, E.. "No excuse leadership : lessons from the U.S. army's elite rangers.--". Cet. 1.-- New Jersey: John Wiley & Sons, 2004. Buku.