Citazione Stile APA (7a Edizione)

Lofgren, D. L. (1995). The bug creek problem and the and the cretaceous tertiary transition at McGuire creek, Montana. University of California Press.

Citazione stile Chigago Style (17a edizione)

Lofgren, Donald L. The Bug Creek Problem and the and the Cretaceous Tertiary Transition at McGuire Creek, Montana. Los Angeles: University of California Press, 1995.

Citatione MLA (9a ed.)

Lofgren, Donald L. The Bug Creek Problem and the and the Cretaceous Tertiary Transition at McGuire Creek, Montana. University of California Press, 1995.