APA aipamena

Yevgenia Stepanova & Schneierson Vic. (1988). Frederick Engels: A short biography. Progress.

Chicago Style aipamena

Yevgenia Stepanova and Schneierson Vic. Frederick Engels: A Short Biography. Moscow: Progress, 1988.

MLA aipamena

Yevgenia Stepanova and Schneierson Vic. Frederick Engels: A Short Biography. Progress, 1988.