Gaya APA

Chapin, C, E. (1989). Field Excursion to Volcanic Terrances in The western United States, Volume I : Southern Rocky Mountain Region . United States of America: IAVCEI General Assembly.

Gaya MLA

Chapin, Charles, E.. "Field Excursion to Volcanic Terrances in The western United States, Volume I : Southern Rocky Mountain Region". United States of America: IAVCEI General Assembly, 1989. Text.