Highsmith, R. M. (1958). Atlas of Oregon agriculture. Agricultural Experiment Station, Oregon State College.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHighsmith, Richard M. Atlas of Oregon Agriculture. Corvallis, Or.: Agricultural Experiment Station, Oregon State College, 1958.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHighsmith, Richard M. Atlas of Oregon Agriculture. Agricultural Experiment Station, Oregon State College, 1958.
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