Forbes, S., Campbell, T. C., & Campbell, N. (2015). PlantPure nation: The truth is a stubborn thing. It doesn't go away (Limited edition.). PlantPure Productions LCC.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Forbes, Steve, T. Colin Campbell, و Nelson Campbell. PlantPure Nation: The Truth Is a Stubborn Thing. It Doesn't Go Away. Limited edition. [Charlotte, North Carolina]: PlantPure Productions LCC, 2015.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Forbes, Steve, et al. PlantPure Nation: The Truth Is a Stubborn Thing. It Doesn't Go Away. Limited edition. PlantPure Productions LCC, 2015.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.