To cite package 'QTLNetworkR' in publications use:

Zheng Wenjun. 2009. QTLNetworkR: software package for QTL visualization. R package version 0.1-2.http://qtlnetworkr.r-forge.r-project.org/.

@Manual{RQTLNetwork_wjZheng,
    title = {QTLNetworkR: software package for QTL visualization},
    author = {Wenjun Zheng},
    year = {2009},   
    url = {http://qtlnetworkr.r-forge.r-project.org/}
}