APA

Soreng R. J., National Museum of Natural History U.S & United States National Herbarium. (2003). Catalogue of New World grasses (Poaceae). Washington, D.C: Dept. of Systematic Biology-Botany, National Museum of Natural History.

Chicago

Soreng Robert John, National Museum of Natural History U.S and United States National Herbarium. 2003. Catalogue of New World grasses (Poaceae). Washington, D.C: Dept. of Systematic Biology-Botany, National Museum of Natural History.

Harvard

Soreng R. J., National Museum of Natural History U.S and United States National Herbarium. (2003). Catalogue of New World grasses (Poaceae). Washington, D.C: Dept. of Systematic Biology-Botany, National Museum of Natural History.

MLA

Soreng Robert John, National Museum of Natural History U.S and United States National Herbarium. Catalogue of New World grasses (Poaceae). Washington, D.C: Dept. of Systematic Biology-Botany, National Museum of Natural History. 2003.