APA ציטוט
Engels, F. (2001). The Part played by labour in the transition from ape to man. Electric Book Co..
Chicago Style (17th ed.) Citation
Engels, Friedrich. The Part Played by Labour in the Transition from Ape to Man. London: Electric Book Co., 2001.
ציטוט MLA
Engels, Friedrich. The Part Played by Labour in the Transition from Ape to Man. Electric Book Co., 2001.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.