APA

Gradstein F. M., Ogg J. G., .Geologic time scale 2004 - whi, how, and where next. : .

Chicago

Gradstein Felix M, Ogg James G, .Geologic time scale 2004 - whi, how, and where next. : .

Harvard

Gradstein F. M., Ogg J. G., .Geologic time scale 2004 - whi, how, and where next. : .

MLA

Gradstein Felix M, Ogg James G, .: . .