SINGH, S. W. (2010). Identification of weeds and their control measures. Tanay Sharma Scientific Publishers.
Chicago-referens (17:e uppl.)SINGH, Surjit Walia. Identification of Weeds and Their Control Measures. Tanay Sharma Scientific Publishers, 2010.
MLA-referens (9:e uppl.)SINGH, Surjit Walia. Identification of Weeds and Their Control Measures. Tanay Sharma Scientific Publishers, 2010.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.