APA Edition Citation

Brain Harl and .W and Richard L. Armstrong and Allen V Cox. (1989). A Geologic Time Scale. CUP.

Chicago Edition Citation

Brain Harl and .W and Richard L. Armstrong and Allen V Cox. A Geologic Time Scale. Cambridge: CUP, 1989.

MLA Edition Citation

Brain Harl and .W and Richard L. Armstrong and Allen V Cox. A Geologic Time Scale. CUP, 1989.

Warning: These citations may not always be 100% accurate.