APA

Piperno D. R., Pearsall D. M., . (1997). The silica bodies of tropical American grasses: morphology, taxonomy, and implications for grass systematics and fossil phytolith identification. Washington, D.C: Smithsonian Institution Press.

Chicago

Piperno Dolores R, Pearsall Deborah M, . 1997. The silica bodies of tropical American grasses: morphology, taxonomy, and implications for grass systematics and fossil phytolith identification. Washington, D.C: Smithsonian Institution Press.

Harvard

Piperno D. R., Pearsall D. M., . (1997). The silica bodies of tropical American grasses: morphology, taxonomy, and implications for grass systematics and fossil phytolith identification. Washington, D.C: Smithsonian Institution Press.

MLA

Piperno Dolores R, Pearsall Deborah M, . The silica bodies of tropical American grasses: morphology, taxonomy, and implications for grass systematics and fossil phytolith identification. Washington, D.C: Smithsonian Institution Press. 1997.