Παραπομπή APA

Killops , S., & Killops , V. (2005). Introduction to organic geochemistry (2nd ed.). Black well publishing company.

Παραπομπή Chicago Style

Killops , Stephen, και Vanessa Killops. Introduction to Organic Geochemistry. 2nd ed. USA: Black well publishing company, 2005.

Παραπομπή MLA

Killops , Stephen, και Vanessa Killops. Introduction to Organic Geochemistry. 2nd ed. Black well publishing company, 2005.