MLA

Hightshoe, Gary L, and Harlen Groe. North American Plantfile : a Visual Guide to Plant Selection -- for Use In Landscape Design. New York: McGraw-Hill, 1998.

APA

Hightshoe, G. L, & Groe, H. (1998). North American plantfile : a visual guide to plant selection -- for use in landscape design. New York: McGraw-Hill.

Chicago

Hightshoe, Gary L., and Harlen Groe. North American Plantfile: A Visual Guide to Plant Selection -- for Use In Landscape Design. New York: McGraw-Hill, 1998.