Gaya APA
Bergamini, D. (1968).
the Universe: young readers adition / David Bergamini .
:
Time Life Books.
Gaya MLA
Bergamini, David.
"the Universe: young readers adition / David Bergamini".
:
Time Life Books,
1968.
Pendidikan Guru Madrasah Ibtidaiyah.