APA Edition Citation

Harl and W. B and Gilbert Smith .A and Wilcock B. (1964). Phanerozoic Time-Scale. GSL.

Chicago Edition Citation

Harl and W. B and Gilbert Smith .A and Wilcock B. Phanerozoic Time-Scale. London: GSL, 1964.

MLA Edition Citation

Harl and W. B and Gilbert Smith .A and Wilcock B. Phanerozoic Time-Scale. GSL, 1964.

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