Gaya APA

Fick, W, H., Peterson, D, E. (1995). Musk Thistle or Nodding Thistle (Carduus nutans L.) identification and control . Kansas: Kansas State University Agricultural Experiment Station and Cooperative Extension Service.

Gaya MLA

Fick, Walter, H.., Peterson, Dallas, E.. "Musk Thistle or Nodding Thistle (Carduus nutans L.) identification and control". Kansas: Kansas State University Agricultural Experiment Station and Cooperative Extension Service, 1995. e-journal.