Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.

APA Citation Edition Citation

Nelson, F. W., & Howard, D. S. (1986). Trace element analysis of obsidian artifacts from El Mirador, Guatemala. New World Archaeological Foundation.

Chicago Citation Edition Citation

Nelson, Fred W., und David S. Howard. Trace Element Analysis of Obsidian Artifacts from El Mirador, Guatemala. Provo-UT: New World Archaeological Foundation, 1986.

MLA Citation Edition Citation

Nelson, Fred W., und David S. Howard. Trace Element Analysis of Obsidian Artifacts from El Mirador, Guatemala. New World Archaeological Foundation, 1986.