Coombes, A. J. (1992). Trees (1st American ed.). Dorling Kindersley ; Distributed by Houghton Mifflin.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCoombes, Allen J. Trees. 1st American ed. New York : Boston: Dorling Kindersley ; Distributed by Houghton Mifflin, 1992.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCoombes, Allen J. Trees. 1st American ed. Dorling Kindersley ; Distributed by Houghton Mifflin, 1992.
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