Hays, S. (1972). #aConservation and the gospel of efficiency: The progressive conservation movement, 1890-1920. Atheneum.
Chicago Style (17th ed.) CitationHays, Samuel. #aConservation and the Gospel of Efficiency: The Progressive Conservation Movement, 1890-1920. New York: Atheneum, 1972.
MLA引文Hays, Samuel. #aConservation and the Gospel of Efficiency: The Progressive Conservation Movement, 1890-1920. Atheneum, 1972.
警告:這些引文格式不一定是100%准確.