Killops , S., & Killops , V. (2005). Introduction to organic geochemistry (2nd ed.). Black well publishing company.
استشهاد بنمط شيكاغوKillops , Stephen, و Vanessa Killops. Introduction to Organic Geochemistry. 2nd ed. USA: Black well publishing company, 2005.
MLA استشهادKillops , Stephen, و Vanessa Killops. Introduction to Organic Geochemistry. 2nd ed. Black well publishing company, 2005.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.