Gaya APA

Mullineaux, D, R. (1980). The 1980 Eruptions of Mount St. Hellens, Washington : The Eruptive History of Mount St. Hellens . Washington DC: .

Gaya MLA

Mullineaux, Donal, R.. "The 1980 Eruptions of Mount St. Hellens, Washington : The Eruptive History of Mount St. Hellens". Washington DC: , 1980. Text.