APA引文
Crawford, J. R. Protestant missions in Congo, 1878-1969. n. p..
Chicago Style (17th ed.) Citation
Crawford, John R. Protestant Missions in Congo, 1878-1969. [n. p.: n. p..
MLA引文
Crawford, John R. Protestant Missions in Congo, 1878-1969. n. p..
警告：這些引文格式不一定是100％准確.