National Committee on Agricultural Services (Canada), Agricultural Institute of Canada, & Canadian Society of Technical Agriculturists. Scientific agriculture. National Committee on Agricultural Services [etc.].
Chicago-referens (17:e uppl.)National Committee on Agricultural Services (Canada), Agricultural Institute of Canada, och Canadian Society of Technical Agriculturists. Scientific Agriculture. Ottawa [etc.]: National Committee on Agricultural Services [etc.].
MLA-referens (8:e uppl.)National Committee on Agricultural Services (Canada), et al. Scientific Agriculture. National Committee on Agricultural Services [etc.].
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.