Critchfield, H. J. (1978). Sunshine and solar radiation in Washington State. Office of the State Climatologist, Western Washington University.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCritchfield, Howard J. Sunshine and Solar Radiation in Washington State. Bellingham, Wash.: Office of the State Climatologist, Western Washington University, 1978.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCritchfield, Howard J. Sunshine and Solar Radiation in Washington State. Office of the State Climatologist, Western Washington University, 1978.
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