Helland, I. S. (2010). Steps towards a unified basis for scientific models and methods. World Scientific.
芝加哥风格引文Helland, Inge S. Steps Towards a Unified Basis for Scientific Models and Methods. Singapore ; Hackensack, N.J.: World Scientific, 2010.
MLA引文Helland, Inge S. Steps Towards a Unified Basis for Scientific Models and Methods. World Scientific, 2010.
警告：这些引文格式不一定是100％准确.