Friedrichs, C. (2012). Seven simple tools to build a motivating work environment. Diplomica Verlag.
芝加哥风格引文Friedrichs, Christian. Seven Simple Tools to Build a Motivating Work Environment. Hamburg: Diplomica Verlag, 2012.
MLA引文Friedrichs, Christian. Seven Simple Tools to Build a Motivating Work Environment. Diplomica Verlag, 2012.
警告：这些引文格式不一定是100％准确.