Citazione Stile APA (7a Edizione)

Michel, H. V., Asaro, F., Alvarez, W., & Alvarez, L. W. (1990). Geochemical studies of the Cretaceous-Tertiary boundary in ODP Holes 113-689B and 113-690C. PANGAEA.

Citazione stile Chigago Style (17a edizione)

Michel, Helen V., Frank Asaro, Walter Alvarez, e Luis W. Alvarez. Geochemical Studies of the Cretaceous-Tertiary Boundary in ODP Holes 113-689B and 113-690C. PANGAEA, 1990.

Citatione MLA (9a ed.)

Michel, Helen V., et al. Geochemical Studies of the Cretaceous-Tertiary Boundary in ODP Holes 113-689B and 113-690C. PANGAEA, 1990.