Roberts, R. (2012). Yammer starter. Packt Publishing.
芝加哥风格引文Roberts, Ralph. Yammer Starter. Birmingham, [Eng.]: Packt Publishing, 2012.
MLA引文Roberts, Ralph. Yammer Starter. Packt Publishing, 2012.
警告：这些引文格式不一定是100％准确.
APA引文