Gaya APA

Cobit 4.1. (2007). united states of America: .

Gaya Chicago

Cobit 4.1. . united states of America: , 2007. Text.

Gaya MLA

Cobit 4.1. . united states of America: , 2007. Text.

Gaya Turabian

Cobit 4.1. united states of America: , 2007. Print.