APA Style
Hawking, S., Widodo, A, T, K. (2020).
Black Holes and Baby Universes .
Jakarta:
Gramedia Pustaka Utama.
MLA Style
Hawking, Stephen., Widodo, Alex, Tri, Kantjono.
"Black Holes and Baby Universes".
Jakarta:
Gramedia Pustaka Utama,
2020.
Printed Book.