Cita APA

Sanger, D. E., & Perlroth, N. Internet giants erect barriers to thwart spy agencies. Manila Bulletin.

Citación estilo Chicago

Sanger, David E., and Nicole Perlroth. "Internet Giants Erect Barriers to Thwart Spy Agencies." Manila Bulletin .

Cita MLA

Sanger, David E., and Nicole Perlroth. "Internet Giants Erect Barriers to Thwart Spy Agencies." Manila Bulletin, .

Warning: These citations may not always be 100% accurate.