Cita APA (7a ed.)

College Park Colloquium on Chemical Evolution (2nd & Ponnamperuma, C. (1977). Chemical evolution of the early Precambrian. Academic Press.

Cita Chicago Style (17a ed.)

College Park Colloquium on Chemical Evolution (2nd y Cyril Ponnamperuma. Chemical Evolution of the Early Precambrian. New York [etc.]: Academic Press, 1977.

Cita MLA (9a ed.)

College Park Colloquium on Chemical Evolution (2nd y Cyril Ponnamperuma. Chemical Evolution of the Early Precambrian. Academic Press, 1977.