Crockett, J. U. (1971). Lawns and ground covers. Time-Life Books.
Chicago Style (17. basım) AtıfCrockett, James Underwood. Lawns and Ground Covers. Alexandria, Virginia: Time-Life Books, 1971.
MLA (9th ed.) AtıfCrockett, James Underwood. Lawns and Ground Covers. Time-Life Books, 1971.
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