Petrides, G. A. (1986). A field guide to trees and shrubs; field marks of all trees, shrubs, and woody vines that grow wild in the northeastern and north-central united states and in southeastern and south-central canada (Second edition.). Houghton Mifflin.
Citação do estilo Chicago (17ª ed.)Petrides, George A. A Field Guide to Trees and Shrubs; Field Marks of All Trees, Shrubs, and Woody Vines That Grow Wild in the Northeastern and North-central United States and in Southeastern and South-central Canada. Second edition. Boston: Houghton Mifflin, 1986.
Citação MLA (9ª ed.)Petrides, George A. A Field Guide to Trees and Shrubs; Field Marks of All Trees, Shrubs, and Woody Vines That Grow Wild in the Northeastern and North-central United States and in Southeastern and South-central Canada. Second edition. Houghton Mifflin, 1986.