Esteves, P. (2006). Differences between Drilon and Atienza deepening. Manila Times.
Chicago-referens (17:e uppl.)Esteves, Patricia. "Differences Between Drilon and Atienza Deepening." Manila Times 2006.
MLA-referens (9:e uppl.)Esteves, Patricia. "Differences Between Drilon and Atienza Deepening." Manila Times, 2006.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.