APA-referens (7:e uppl.)

(1997). Pinatubo: The greening. Holiday Inn Resort Clark Field.

Chicago-referens (17:e uppl.)

Pinatubo: The Greening. Clark Special Economic Zone, Pampanga: Holiday Inn Resort Clark Field, 1997.

MLA-referens (9:e uppl.)

Pinatubo: The Greening. Holiday Inn Resort Clark Field, 1997.