Willner, W. (2020). What is an alliance? Pensoft Publishers.
芝加哥风格引文Willner, Wolfgang. What Is an Alliance? Pensoft Publishers, 2020.
MLA引文Willner, Wolfgang. What Is an Alliance? Pensoft Publishers, 2020.
警告：这些引文格式不一定是100％准确.
APA引文