Knobel, E. (1972). Identify trees and shrubs by their leaves: A guide to trees and shrubs native to the northeast. Dover.
Citace podle Chicago (17th ed.)Knobel, Edward. Identify Trees and Shrubs by Their Leaves: A Guide to Trees and Shrubs Native to the Northeast. Nueva York: Dover, 1972.
Citace podle MLA (9th ed.)Knobel, Edward. Identify Trees and Shrubs by Their Leaves: A Guide to Trees and Shrubs Native to the Northeast. Dover, 1972.
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