Peterson, R. T. (1986). Peterson first guide to wildflowers of northeastern and north-central North America. Houghton Mifflin.
Cita Chicago Style (17a ed.)Peterson, Roger Tory. Peterson First Guide to Wildflowers of Northeastern and North-central North America. Boston: Houghton Mifflin, 1986.
Cita MLA (8a ed.)Peterson, Roger Tory. Peterson First Guide to Wildflowers of Northeastern and North-central North America. Houghton Mifflin, 1986.
Precaución: Estas citas no son 100% exactas.