Gaya APA

North Sumatera in Brief 2004. (2004). : .

Gaya Chicago

North Sumatera in Brief 2004. . : , 2004. Text.

Gaya MLA

North Sumatera in Brief 2004. . : , 2004. Text.

Gaya Turabian

North Sumatera in Brief 2004. : , 2004. Print.