Gaya APA

BUTT, C, R, M, &, S, R, E. (1980). CONCEPTUAL MODELS IN EXPLORATION GEOCHEMISTRY (1980). New York: New York : Elsevier Scientific Publishing Co.,.

Gaya MLA

BUTT, C, R, M, &, SMITH,, R, E. "CONCEPTUAL MODELS IN EXPLORATION GEOCHEMISTRY". 1980 New York: New York : Elsevier Scientific Publishing Co.,, 1980. Text.