Hubendick, B. (1961). Studies on Venezuelan Planorbidae. Elanders boktr..
芝加哥风格引文Hubendick, Bengt. Studies on Venezuelan Planorbidae. Göteborg: Elanders boktr., 1961.
MLA引文Hubendick, Bengt. Studies on Venezuelan Planorbidae. Elanders boktr., 1961.
警告：这些引文格式不一定是100％准确.