Gaya APA

Schulz, W, G. (1983). Krakatau 100 years later , still the ''Classic'' Volcanic Eruption . Bandung, Jawa Barat, Indonesia: Smithsonian News Service.

Gaya MLA

Schulz, William, G.. "Krakatau 100 years later , still the ''Classic'' Volcanic Eruption". Bandung, Jawa Barat, Indonesia: Smithsonian News Service, 1983. Text.