Gaya APA
Engels, F. (1985).
The origin of the family, private property and the state, introd.by Michele Barrett. .
Harmondsworth:
Penguin Books.
Gaya MLA
Engels, Friedrich.
"The origin of the family, private property and the state, introd.by Michele Barrett. ".
Harmondsworth:
Penguin Books,
1985.
Buku.