Gaya APA

Letter, J. (1983). Tsunamis of Vulcanic Origin : Summary of Causes With Particular Reference to Krakatoa (Agustus 1983). New Zealand: Geophysics Division.

Gaya MLA

Letter, J.H.. "Tsunamis of Vulcanic Origin : Summary of Causes With Particular Reference to Krakatoa". Agustus 1983 New Zealand: Geophysics Division, 1983. Text.