Citazione Stile APA (7a Edizione)

Perpeña, E. C. (2001). Improving cell phone services. Manila Times.

Citazione stile Chigago Style (17a edizione)

Perpeña, Ed C. "Improving Cell Phone Services." Manila Times 2001.

Citatione MLA (9a ed.)

Perpeña, Ed C. "Improving Cell Phone Services." Manila Times, 2001.