Harlow, W. M. (1959). Fruit key and twig key to trees and shrubs. Dover.
Chicagoスタイル(17版)引用形式Harlow, William M. Fruit Key and Twig Key to Trees and Shrubs. New York, USA: Dover, 1959.
MLA(9版)引用形式Harlow, William M. Fruit Key and Twig Key to Trees and Shrubs. Dover, 1959.
警告: この引用は必ずしも正確ではありません.