Gaya APA
Wolff., C, B, ;, J, B, C, ;, R, L. (1976).
History of civilization 1715 to the present (ed. 5).
New Jersey:
Prentice Hall.
Gaya MLA
Wolff., Crane, Brinton, ;, John, B., Christoper, ;, Robert, Lee.
"History of civilization 1715 to the present".
ed. 5
New Jersey:
Prentice Hall,
1976.
Text.