Gaya APA

HANGEN, W, 1. (1966). The muted revolution: East Germany's challenge to Rusia and the West . New York: Alfred A. Knopf.

Gaya MLA

HANGEN, Welles,, 1930-. "The muted revolution: East Germany's challenge to Rusia and the West". New York: Alfred A. Knopf, 1966. Buku.