Gaya APA

Pearson New International 7th. (2014). : .

Gaya Chicago

Pearson New International 7th. 7th. : , 2014. Text.

Gaya MLA

Pearson New International 7th. 7th. : , 2014. Text.

Gaya Turabian

Pearson New International 7th. : , 2014. Print.