APA Style
Harland, W.B. et. al. (1982).
A Geologic Time Scale 1989 .
New York:
press syndicate of the univercity of cambritge.
Chicago Style
Harland, W.B. et. al.
A Geologic Time Scale 1989.
New York:
press syndicate of the univercity of cambritge,
1982.
Text.
MLA Style
Harland, W.B. et. al.
A Geologic Time Scale 1989.
New York:
press syndicate of the univercity of cambritge,
1982.
Text.
Turabian Style
Harland, W.B. et. al.
A Geologic Time Scale 1989.
New York:
press syndicate of the univercity of cambritge,
1982.
Print.