Gaya APA
Smoot, G., Davidson, K. (1993).
Wrinkles In Time : The Imprint of Creation .
Great Britain:
Little, Brown and Company.
Gaya MLA
Smoot, George., Davidson, Keay.
"Wrinkles In Time : The Imprint of Creation".
Great Britain:
Little, Brown and Company,
1993.
Text.