Olsen, D., & Richards, J. (1994). Inter-basin comparison study: Columbia River salmon production compared to other West Coast production areas : phase II analysis. Pacific Northwest Project?].
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Olsen, Darryll, و Jack Richards. Inter-basin Comparison Study: Columbia River Salmon Production Compared to Other West Coast Production Areas : Phase II Analysis. [S.l.: Pacific Northwest Project?], 1994.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Olsen, Darryll, و Jack Richards. Inter-basin Comparison Study: Columbia River Salmon Production Compared to Other West Coast Production Areas : Phase II Analysis. Pacific Northwest Project?], 1994.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.