Lumbantobing, A. (1980). The Lutheran Churches of North Sumatra. Asian perspective.
芝加哥风格引文Lumbantobing, Andrew. "The Lutheran Churches of North Sumatra." Asian Perspective 1980.
MLA引文Lumbantobing, Andrew. "The Lutheran Churches of North Sumatra." Asian Perspective, 1980.
警告：这些引文格式不一定是100％准确.