Singh, O. S. (2011). Proceedings: IV national forestry conference 2009- FRI, Dehradun. FRI Dehradun.
芝加哥风格引文Singh, Ombir; Singh. Proceedings: IV National Forestry Conference 2009- FRI, Dehradun. Dehradun (Uttarakhand): FRI Dehradun, 2011.
MLA引文Singh, Ombir; Singh. Proceedings: IV National Forestry Conference 2009- FRI, Dehradun. FRI Dehradun, 2011.
警告：这些引文格式不一定是100％准确.