Gaya APA

GUNAWAN, Inet. (2012). Smart english for customer service . Jakarta: PT. Bhuana Ilmu Populer.

Gaya Chicago

GUNAWAN, Inet. Smart english for customer service. Jakarta: PT. Bhuana Ilmu Populer, 2012. Text.

Gaya MLA

GUNAWAN, Inet. Smart english for customer service. Jakarta: PT. Bhuana Ilmu Populer, 2012. Text.

Gaya Turabian

GUNAWAN, Inet. Smart english for customer service. Jakarta: PT. Bhuana Ilmu Populer, 2012. Print.