APA

Lorence D. H., . (1999). A nomenclator of mexican and Central American Rubiaceae. St. Louis, MO: Missouri Botanical Garden Press.

Chicago

Lorence David H, . 1999. A nomenclator of mexican and Central American Rubiaceae. St. Louis, MO: Missouri Botanical Garden Press.

Harvard

Lorence D. H., . (1999). A nomenclator of mexican and Central American Rubiaceae. St. Louis, MO: Missouri Botanical Garden Press.

MLA

Lorence David H, . A nomenclator of mexican and Central American Rubiaceae. St. Louis, MO: Missouri Botanical Garden Press. 1999.