Gaya APA
Asimov, Isaac. (1986).
Foundation and Earth .
Garden City,:
Doubleday.
Gaya Chicago
Asimov, Isaac.
Foundation and Earth.
Garden City,:
Doubleday,
1986.
Text.
Gaya MLA
Asimov, Isaac.
Foundation and Earth.
Garden City,:
Doubleday,
1986.
Text.
Gaya Turabian
Asimov, Isaac.
Foundation and Earth.
Garden City,:
Doubleday,
1986.
Print.