APA引文
Hougaard, S. (2005). The Business Idea: The Early Stages of Entrepreneurship. Springer Berlin Heidelberg. https://doi.org/10.1007/b138370
芝加哥风格引文
Hougaard, Søren. The Business Idea: The Early Stages of Entrepreneurship. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. https://doi.org/10.1007/b138370.
MLA引文
Hougaard, Søren. The Business Idea: The Early Stages of Entrepreneurship. Springer Berlin Heidelberg, 2005. https://doi.org/10.1007/b138370.
警告：这些引文格式不一定是100％准确.