Pacific Northwest Forest Experiment Station (Portland, Or.), & Pacific Northwest Forest and Range Experiment Station (Portland, Or.). (1928). Forest research notes. Pacific Northwest Forest Experiment Station.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Pacific Northwest Forest Experiment Station (Portland, Or.), و Or.) Pacific Northwest Forest and Range Experiment Station (Portland. Forest Research Notes. Portland, Or.: Pacific Northwest Forest Experiment Station, 1928.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Pacific Northwest Forest Experiment Station (Portland, Or.), و Or.) Pacific Northwest Forest and Range Experiment Station (Portland. Forest Research Notes. Pacific Northwest Forest Experiment Station, 1928.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.